AC Cost per Hour Calculator
Find out how much your air conditioner costs to run per hour. Enter AC wattage and electricity rate for instant cost estimates.
Free Energy & Environment Calculators
213 toolsEstimate your energy costs and environmental impact with calculators for kWh costs, appliance usage, solar savings, carbon footprint, water conservation, and waste management.
Electricity
27 calculatorsAppliance energy use, power conversion, and electricity cost calculators.
Amps to Watts Calculator
Convert amps to watts quickly. Enter amperage, voltage, and power factor for accurate watt conversion for both AC and DC circuits.
Appliance Energy Use Calculator
Calculate how much energy any appliance uses and what it costs to run. Enter wattage, hours of daily use, and your electricity rate.
Battery Backup Time Calculator
Calculate how long a battery will power your load. Enter battery Ah, voltage, depth of discharge, and load watts to find backup time in hours.
Dishwasher Cost per Cycle Calculator
Calculate the electricity and water cost per dishwasher cycle. Compare running costs to hand washing and find annual dishwashing expenses.
Dryer Cost per Load Calculator
Calculate how much it costs to run your dryer per load. Enter kWh per cycle and electricity rate to find per-load and annual drying costs.
Electric Water Heater Cost Calculator
Calculate the annual cost of running an electric water heater. Enter daily kWh usage and electricity rate to estimate annual hot water expenses.
EV Home Charging Cost Calculator
Calculate the cost of charging your electric vehicle at home. Enter battery size, charger efficiency, and electricity rate for per-charge and monthly costs.
EV Station Charging Cost Calculator
Calculate the cost of charging your electric vehicle at a public charging station. Enter kWh delivered and station rate for per-session and per-mile costs.
Freezer Annual Cost Calculator
Calculate the annual electricity cost of running a standalone freezer. Enter the annual kWh rating and your electricity rate for instant cost estimates.
Heat Pump Water Heater Cost Calculator
Estimate the annual cost of running a heat pump water heater. Compare energy-efficient heat pump costs against standard electric and gas water heaters.
Hot Tub Cost Calculator
Calculate the monthly electricity cost of running a hot tub. Enter heater kW, pump kW, daily run hours, and rate for accurate hot tub energy costs.
kVA to kW Calculator
Convert kVA to kW using power factor. Size generators, transformers, and switchgear by finding real power capacity from kVA nameplate ratings.
kWh Cost Calculator
Calculate the cost of electricity usage in kilowatt-hours. Enter your kWh consumption and utility rate to find your total energy cost.
LED vs Incandescent Savings Calculator
Compare the running cost of LED and incandescent bulbs. See how much you save annually by switching to LED lighting in your home.
Lighting Cost Calculator
Calculate the total cost of running all your light fixtures. Enter total fixture wattage, hours of use, and electricity rate for a full lighting cost estimate.
Pool Pump Cost Calculator
Calculate the electricity cost of running a swimming pool pump. Enter pump horsepower, daily run hours, and electricity rate for monthly and annual costs.
Power Factor Correction Calculator
Calculate the kVAR capacitor needed for power factor correction. Enter current and target power factors with kW load to find required capacitance.
Refrigerator Annual Cost Calculator
Calculate the annual electricity cost of your refrigerator. Enter annual kWh from the EnergyGuide label and your rate to see yearly and monthly costs.
Single-Phase Power Calculator
Calculate single-phase electrical power from voltage, current, and power factor. Find watts, amps, or volts for residential and light commercial circuits.
Space Heater Cost Calculator
Calculate how much it costs to run a space heater per hour, day, month, or year. Enter wattage, usage hours, and electricity rate.
Standby Power Cost Calculator
Calculate the annual cost of standby (phantom) power for devices left plugged in. Find out how much vampire energy drains from your wallet each year.
Three-Phase Power Calculator
Calculate three-phase electrical power. Enter voltage, current, and power factor to find watts, kW, and kVA for balanced three-phase circuits.
UPS Runtime Calculator
Calculate how long a UPS will power your equipment. Enter battery watt-hours, efficiency, and load to find backup runtime in minutes and hours.
VA to Watts Calculator
Convert volt-amps (VA) to watts using power factor. Essential for UPS sizing, transformer loading, and understanding the difference between VA and watt ratings.
Washer Cost per Load Calculator
Calculate the electricity and water cost per washing machine load. Enter energy use, water cost, and loads per week for total laundry washing expenses.
Watts to Amps Calculator
Convert watts to amps for any voltage. Enter wattage and voltage to find current draw for circuit sizing, breaker selection, and wire gauge planning.
Solar
17 calculatorsSolar panel sizing, savings, payback, and incentive calculators.
Community Solar Savings Calculator
Calculate your savings from a community solar subscription. Compare your utility rate to the community solar rate and estimate annual bill reductions.
Off-Grid Solar Sizing Calculator
Size an off-grid solar system with battery storage for autonomous living. Calculate panels, batteries, and charge controller requirements.
Solar + Battery Savings Calculator
Estimate additional savings from pairing solar panels with battery storage. Calculate self-consumption gains and peak rate arbitrage value.
Solar ITC (Investment Tax Credit) Calculator
Calculate your federal solar Investment Tax Credit (ITC) based on total system cost. Estimate the 30% federal tax credit for residential solar installations.
Solar LCOE Calculator
Calculate the Levelized Cost of Energy (LCOE) for your solar system. Compare your solar electricity cost per kWh against utility rates.
Solar Net Metering Calculator
Calculate your annual net metering credits from excess solar energy exported to the grid. Estimate your credit value based on export rates.
Solar Panel Count Calculator
Calculate how many solar panels you need based on your system size in kW and individual panel wattage. Free panel count estimator for residential and commercial installs.
Solar Panel Degradation Calculator
Calculate how solar panel output declines over time due to degradation. Estimate year-by-year production and total lifetime energy output.
Solar Panel Output Calculator
Estimate daily and annual solar panel output from wattage, peak sun hours, and system derate factors for planning and quote comparisons.
Solar Payback Period Calculator
Calculate how many years it takes for solar panels to pay for themselves through electricity savings. Free solar payback estimator with incentive support.
Solar PPA vs Lease vs Buy Calculator
Compare the net present value of a solar PPA, lease, and cash purchase over 25 years. Find the best solar financing option for your home.
Solar ROI Calculator
Calculate the return on investment for your solar panel system over its lifetime. Compare solar ROI against other investments.
Solar Roof Area Needed Calculator
Calculate the roof area required for your solar panel installation based on panel count and dimensions. Free solar roof space estimator.
Solar Savings per Year Calculator
Estimate your annual electricity savings from solar panels based on system production and utility rates. Free solar savings estimator.
Solar System Size Calculator
Determine the right solar system size in kW based on your annual electricity usage, peak sun hours, and system efficiency. Free solar sizing tool.
SREC Value Calculator
Calculate the annual value of Solar Renewable Energy Certificates (SRECs) based on system size, capacity factor, and current SREC market prices.
State Solar Incentive Calculator
Calculate total solar incentives by combining federal ITC with state rebates, tax credits, and utility incentives. Estimate your true net solar cost.
Carbon
15 calculatorsCarbon footprint, intensity, and net zero pathway calculators.
Business Carbon Footprint Calculator
Estimate your company's total carbon footprint across Scope 1, 2, and 3 emissions. Enter direct, energy, and supply chain data to see total CO2 in tonnes per year.
Carbon Intensity Calculator
Calculate your carbon intensity ratio by dividing total CO2 emissions by revenue or output. Track efficiency improvements over time with this key sustainability metric.
Carbon per Dollar Revenue Calculator
Calculate your CO2 emissions per dollar of revenue. Enter total emissions and annual revenue to benchmark your carbon efficiency against industry peers.
Carbon per Employee Calculator
Calculate CO2 emissions per employee to benchmark your workforce carbon efficiency. Enter total emissions and headcount to see per-capita corporate emissions.
Carbon Tax Estimator Calculator
Estimate your carbon tax liability based on total CO2 emissions and the tax rate per tonne. Compare costs under different carbon pricing scenarios.
Concrete Carbon Calculator
Calculate CO2 emissions from concrete production. Enter volume in cubic meters and optional mix adjustments to estimate the carbon footprint of your concrete pour.
Diet Carbon Footprint Calculator
Estimate the carbon footprint of your diet based on weekly food consumption. Enter servings of meat, dairy, grains, and vegetables to see your annual food CO2 emissions.
Embodied Carbon in Materials Calculator
Calculate the embodied carbon of building materials. Enter quantities of concrete, steel, timber, glass, and aluminum to estimate total CO2 from material production.
Home Energy Carbon Calculator
Calculate CO2 emissions from your home energy use. Enter electricity kWh and natural gas therms to estimate annual carbon emissions from household energy consumption.
Household Carbon Footprint Calculator
Estimate your household's total annual carbon footprint from energy, transport, waste, and food. Enter usage data to see your CO2 emissions in tonnes per year.
Individual Carbon Footprint Calculator
Calculate your personal carbon footprint by dividing household emissions among occupants and adding individual travel and consumption. See your per-person CO2 in tonnes.
Lifecycle Assessment Simplified Calculator
Estimate total lifecycle CO2 across five stages: raw materials, manufacturing, transportation, use phase, and end of life. A simplified LCA for products and buildings.
Net Zero Pathway Calculator
Plan your path to net zero emissions. Enter starting CO2, target year, and base year to calculate the annual reduction needed to reach net zero on schedule.
SBTi Target Calculator
Calculate your Science Based Target using the SBTi absolute contraction approach. Enter base-year emissions and target year to see the required annual CO2 reduction.
Steel Carbon Calculator
Calculate CO2 emissions from steel production. Enter tonnes of steel and select production method to estimate embodied carbon from structural and reinforcing steel.
Efficiency
11 calculatorsThermostat, ventilation, degree day, and energy efficiency calculators.
Air Change Rate (ACH) Calculator
Calculate the air changes per hour (ACH) for a room or building. Determine ventilation rate from airflow volume and room size.
Cool Roof Savings Calculator
Calculate cooling energy savings from a cool roof (reflective roofing). Estimate reduced air conditioning costs and payback from high-reflectance roofing materials.
Cooling Degree Days (CDD) Calculator
Calculate cooling degree days from daily temperatures. Estimate CDD for energy analysis, air conditioning cost planning, and cooling season comparisons.
ERV/HRV Savings Calculator
Calculate energy savings from an ERV or HRV ventilation system. Compare heat recovery ventilation costs to standard exhaust-only ventilation.
Green Roof Savings Calculator
Calculate energy savings and benefits from installing a green (vegetated) roof. Estimate insulation value, cooling savings, and stormwater management benefits.
Heat Loss & Degree Day Calculator
Calculate home heat loss using heating degree days. Estimate seasonal heating energy consumption and costs based on HDD and building thermal performance.
Heating Degree Days (HDD) Calculator
Calculate heating degree days from daily temperatures. Estimate HDD for energy analysis, fuel planning, and heating season comparisons.
Programmable Thermostat Savings Calculator
Calculate energy savings from using a programmable thermostat with temperature setbacks. Estimate cost reduction from scheduled heating and cooling adjustments.
Setback Temperature Savings Calculator
Calculate how much you save by lowering your thermostat a specific number of degrees. Estimate savings per degree of temperature setback.
Smart Thermostat Savings Calculator
Calculate annual savings from installing a smart thermostat. Estimate energy reduction from automatic scheduling, learning, and occupancy detection.
Ventilation CFM Calculator
Calculate the required CFM ventilation rate for a room or building. Determine airflow needs based on room size, occupancy, and ASHRAE standards.
Utility
5 calculatorsFurnace, generator, and utility fuel cost calculators.
Business Generator Sizing Calculator
Size a commercial or industrial backup generator. Enter critical loads and demand factor to find the minimum kW and kVA generator capacity needed.
Furnace Running Cost Calculator
Estimate the cost of running your gas or oil furnace per hour, day, and month. Enter fuel input, efficiency, and fuel price for accurate heating cost estimates.
Gas Water Heater Cost Calculator
Estimate the annual cost of running a natural gas water heater. Enter daily therms usage and gas rate to see monthly and yearly hot water expenses.
Generator Fuel Cost Calculator
Calculate generator fuel costs per hour, day, and month. Enter fuel consumption rate and fuel price to estimate total operating cost for any generator.
Home Generator Sizing Calculator
Size a home backup generator by entering essential loads. Calculate the total kW needed and find the right generator size including a safety margin.
Billing
9 calculatorsElectric bill breakdown, time-of-use, tier pricing, and net metering calculators.
Annual Electricity Cost Calculator
Estimate your yearly electricity expenses by entering annual kWh usage and rate. Plan your energy budget and compare year-over-year costs.
Demand Charge Calculator
Calculate demand charges on your electric bill. Enter peak kW demand and your utility's demand rate to understand this often-overlooked billing component.
Electric Bill Breakdown Calculator
Break down your electric bill into energy charges, delivery fees, taxes, and surcharges. Understand each line item and find where your money goes.
Monthly Electricity Cost Calculator
Estimate your monthly electricity bill by entering total kWh usage and your utility rate. Get an instant breakdown of your monthly energy expenses.
Net Metering Credit Calculator
Calculate the value of your solar net metering credits. Enter kWh exported to the grid and credit rate to estimate monthly and annual credit values.
Peak vs Off-Peak Savings Calculator
Calculate how much you can save by shifting electricity use from peak to off-peak hours. Enter kWh shifted and rate difference for instant savings estimates.
Tier Pricing Calculator
Calculate your electricity bill under tiered (block) pricing. Enter usage and rate for each tier to find total cost and effective rate per kWh.
Time-of-Use Rate Calculator
Calculate your electricity bill under time-of-use (TOU) pricing. Enter kWh usage and rates for each period to see total cost and potential savings.
Utility Rate Comparison Calculator
Compare two electricity plans side by side. Enter rates and fees for each plan to see which one costs less for your monthly usage level.
Wind
5 calculatorsWind turbine output, capacity factor, and ROI calculators.
Betz Limit Calculator
Calculate the maximum theoretical power a wind turbine can extract using the Betz Limit (59.3%). Compare theoretical maximum to actual turbine performance.
Small Wind ROI Calculator
Calculate the return on investment for a small wind turbine. Compare lifetime energy savings to installation cost and estimate payback period.
Wind Capacity Factor Calculator
Calculate the capacity factor of a wind turbine from actual vs rated output. Assess real-world performance and compare turbine sites effectively.
Wind Speed to Power Calculator
Convert wind speed into available wind power per square meter of swept area. Uses the kinetic energy equation to show power density at any wind speed.
Wind Turbine Output Calculator
Calculate the annual energy output of a wind turbine based on rotor diameter, wind speed, air density, and turbine efficiency using the power equation.
Renewable
8 calculatorsGeothermal, biomass, hydro, CHP, and renewable energy calculators.
Biomass Energy Calculator
Calculate the energy output from burning biomass fuels. Enter mass, heat value, and boiler efficiency to estimate usable thermal energy in kWh or BTU.
CHP Efficiency Calculator
Calculate the overall efficiency of a Combined Heat and Power (cogeneration) system. Compare CHP thermal plus electrical efficiency to separate generation.
Geothermal Heat Pump Savings Calculator
Calculate annual savings from a geothermal heat pump vs conventional HVAC. Compare operating costs for heating and cooling with ground-source heat pumps.
Geothermal Installation ROI Calculator
Calculate the return on investment and payback period for a geothermal heat pump installation. Factor in incentives, energy savings, and system lifespan.
Grid Parity Calculator
Determine when a renewable energy source reaches grid parity. Compare the levelized cost of renewable energy (LCOE) to retail electricity rates.
Micro-Hydro Power Output Calculator
Calculate the power output of a micro-hydro system from water flow rate, head height, and turbine efficiency. Plan small-scale hydroelectric installations.
REC Value Calculator
Calculate the cost of Renewable Energy Certificates (RECs) to offset your electricity with renewable energy. Estimate your green energy premium.
Renewable Energy Percentage Calculator
Calculate what percentage of your energy comes from renewable sources. Track your renewable energy mix and progress toward sustainability goals.
Battery
5 calculatorsBattery sizing, cycle life, depth of discharge, and cost calculators.
Battery Cost per kWh Calculator
Calculate the true cost per kWh of battery storage by dividing total installed cost by usable capacity. Compare battery economics across brands.
Battery Cycle Life Calculator
Estimate how many years your solar battery will last based on rated cycle life and daily cycling frequency. Plan battery replacement timing and costs.
Battery Depth of Discharge Calculator
Calculate usable battery capacity based on total capacity and depth of discharge. Compare lead-acid vs lithium usable energy for solar storage.
Powerwall Equivalent Calculator
Calculate how many Tesla Powerwalls or equivalent units you need for your energy storage requirements. Enter your capacity need to find the number of units.
Solar Battery Sizing Calculator
Calculate the optimal battery capacity for a solar-plus-storage system. Size your battery bank based on nighttime usage, backup needs, and depth of discharge.
Emissions
14 calculatorsScope 1-3 emissions, GHG protocol, and fuel carbon calculators.
Carbon per kWh Lookup Calculator
Look up grid carbon intensity by region. Select a U.S. state or country to find CO2 grams per kWh and calculate your electricity emissions with local data.
Driving Carbon Footprint Calculator
Calculate CO2 emissions from driving. Enter miles driven and vehicle fuel efficiency to estimate your annual driving carbon footprint from gasoline or diesel.
Electricity Carbon Calculator
Calculate CO2 emissions from electricity usage. Enter kWh consumed and your grid emission factor to estimate your annual electricity carbon footprint.
F-Gas CO2e Calculator
Convert fluorinated gas emissions to CO2 equivalent. Select from HFCs, PFCs, and SF6 with their GWPs to calculate CO2e for refrigerant leak and industrial reporting.
Flying Carbon Footprint Calculator
Calculate CO2 emissions from air travel. Enter flight distance and class to estimate per-passenger carbon footprint including the radiative forcing multiplier.
GHG Protocol Calculator
Calculate total corporate GHG emissions across all three scopes. Enter Scope 1, 2, and 3 data for a guided greenhouse gas inventory following GHG Protocol standards.
Heating Oil Carbon Calculator
Calculate CO2 emissions from heating oil combustion. Enter gallons consumed to estimate your annual carbon footprint from oil-fired furnaces and boilers.
Methane CO2e Calculator
Convert methane emissions to CO2 equivalent. Enter CH4 mass to calculate CO2e using GWP-20 or GWP-100 global warming potentials for climate reporting.
N2O CO2e Calculator
Convert nitrous oxide emissions to CO2 equivalent. Enter N2O mass and GWP to calculate CO2e for agriculture, industrial processes, and GHG reporting.
Natural Gas Carbon Calculator
Calculate CO2 emissions from natural gas combustion. Enter therms or cubic feet consumed to estimate your carbon footprint from gas heating and cooking.
Propane Carbon Calculator
Calculate CO2 emissions from propane (LPG) combustion. Enter gallons used for heating, cooking, or generators to see your annual propane carbon footprint.
Scope 1 Emissions Calculator
Calculate GHG Protocol Scope 1 emissions from direct fuel combustion. Enter fuel quantities for natural gas, diesel, gasoline, and propane to estimate direct CO2.
Scope 2 Emissions Calculator
Calculate GHG Protocol Scope 2 emissions from purchased electricity. Enter kWh usage and grid factor to estimate indirect CO2 from electricity consumption.
Scope 3 Emissions Calculator
Estimate GHG Protocol Scope 3 emissions from your supply chain and value chain. Enter spend by category to calculate indirect CO2 using EEIO emission factors.
Offset
5 calculatorsCarbon offset cost, tree planting, and carbon capture calculators.
Carbon Capture Cost Calculator
Estimate the cost of engineered carbon capture and storage (CCS) or direct air capture (DAC). Enter tonnes CO2 and cost per tonne to budget for removal projects.
Carbon Credit Value Calculator
Calculate the market value of carbon credits. Enter the number of credits and the market price you want to test to estimate total portfolio value for trading or retirement.
Carbon Offset Cost Calculator
Calculate the cost to offset your carbon footprint. Enter tonnes of CO2 and offset price to estimate total offset cost for personal or corporate neutrality.
Reforestation Carbon Calculator
Estimate total carbon sequestration from a reforestation project. Enter hectares, sequestration rate, and project duration to calculate cumulative CO2 removed.
Tree Planting Offset Calculator
Calculate how many trees to plant to offset your CO2 emissions. Enter tonnes CO2 and see trees needed, land area, and time to reach full sequestration.
Audit
3 calculatorsEnergy audit, blower door, and air sealing ROI calculators.
Air Sealing ROI Calculator
Calculate the payback period and return on investment for air sealing your home. Estimate annual energy savings from reduced air leakage.
Blower Door Test (ACH50) Calculator
Calculate air changes per hour at 50 Pascals (ACH50) from blower door test results. Free ACH50 calculator for home energy auditors and inspectors.
Energy Audit Savings Estimator
Estimate total savings from a home energy audit by adding up individual improvement measures. Free energy audit savings calculator for homeowners.
Insulation
10 calculatorsR-value, U-value, window upgrade, and insulation payback calculators.
Attic Insulation Payback Calculator
Calculate the payback period for adding attic insulation. Estimate annual savings and ROI from upgrading your attic insulation R-value.
Door Weatherstripping Savings Calculator
Calculate energy savings from weatherstripping exterior doors. Estimate how much you save by reducing air leakage around doors.
Insulation R-Value to Savings Calculator
Calculate annual energy savings from upgrading insulation R-value. Estimate how much you save by increasing insulation in walls, attics, or floors.
Radiant Barrier Savings Calculator
Calculate cooling savings from installing a radiant barrier in your attic. Estimate reduced heat gain and lower air conditioning costs.
Storm Window Value Calculator
Calculate energy savings from adding storm windows over existing windows. Compare storm window costs and payback vs full window replacement.
Thermal Transmittance (U-Value) Calculator
Calculate the total U-value of a multi-layer wall, roof, or floor assembly. Combine R-values of individual material layers to find overall thermal transmittance.
Triple-Pane Window ROI Calculator
Calculate the return on investment for triple-pane windows vs double-pane. Compare energy savings and payback for triple-glazed window upgrades.
U-Value ↔ R-Value Converter
Convert between U-value and R-value for insulation and building materials. Calculate thermal resistance from thermal transmittance and vice versa.
Wall Insulation Payback Calculator
Calculate the payback period for wall insulation upgrades. Estimate annual energy savings and ROI from insulating or re-insulating your exterior walls.
Window Upgrade ROI Calculator
Calculate the return on investment for upgrading windows. Estimate energy savings from replacing old single or double-pane windows with modern efficient windows.
HVAC
11 calculatorsSEER, HSPF, COP, heat pump, and HVAC sizing calculators.
BTU Requirement Calculator
Calculate the BTU heating or cooling requirement for a room. Estimate the energy needed to heat or cool a space based on volume and temperature change.
Duct Insulation Savings Calculator
Calculate energy savings from insulating HVAC ductwork. Estimate annual savings from adding insulation to ducts in unconditioned spaces.
Duct Sealing Savings Calculator
Calculate energy savings from sealing leaky ductwork. Estimate annual cost reduction and payback from duct sealing with this free HVAC calculator.
Ductless Mini-Split Sizing Calculator
Calculate the right BTU size for a ductless mini-split system. Determine mini-split capacity based on room size, climate, and insulation level.
Furnace AFUE Savings Calculator
Calculate annual savings from upgrading to a higher AFUE furnace. Compare fuel costs between old and new furnace efficiency ratings.
Heat Pump COP Calculator
Calculate the Coefficient of Performance (COP) for your heat pump. Determine heating efficiency by comparing heat output to electrical input.
Heat Pump vs Furnace Cost Calculator
Compare annual heating costs of a heat pump vs gas furnace. Calculate which heating system is cheaper for your home and climate.
HVAC EER Calculator
Calculate the Energy Efficiency Ratio (EER) of your air conditioner or heat pump. Convert between EER and SEER ratings.
HVAC HSPF Savings Calculator
Calculate heating savings from upgrading to a higher HSPF heat pump. Compare annual heating costs between old and new heat pump HSPF ratings.
HVAC SEER Savings Calculator
Calculate annual savings from upgrading to a higher SEER air conditioner. Compare energy costs between old and new AC SEER ratings.
HVAC Sizing Calculator (Manual J Estimate)
Estimate the correct HVAC system size for your home using simplified Manual J principles. Calculate heating and cooling BTU requirements.
Water
26 calculatorsWater usage, bill, conservation, rainwater harvesting, and filtration calculators.
Annual Water Usage Calculator
Estimate your annual water consumption in gallons. Enter daily usage to project yearly totals for budgeting, conservation planning, and system sizing.
Cistern Sizing Calculator
Size a rainwater cistern based on daily demand and the longest expected dry spell. Calculate the tank volume needed to bridge gaps between rain events.
Daily Water Usage Calculator
Calculate your daily household water usage in gallons. Enter fixture types, flow rates, and usage minutes to estimate total daily water consumption.
Drip vs Sprinkler Water Use Calculator
Compare water usage between drip irrigation and sprinkler systems. See how much water and money you can save by switching to drip.
Dual-Flush Toilet Savings Calculator
Estimate annual water and cost savings from a dual-flush toilet. Calculate the blended GPF reduction based on liquid and solid flush ratios.
Greywater Reuse Potential Calculator
Estimate how many gallons of greywater you can capture and reuse from showers, laundry, and sinks for irrigation and toilet flushing.
Hot Water Usage Calculator
Estimate your daily hot water consumption by fixture. Enter shower, faucet, dishwasher, and laundry usage to calculate total hot water demand.
Irrigation Water Budget Calculator
Calculate your weekly irrigation water budget based on landscape area, evapotranspiration rate, crop factor, and system efficiency.
Lawn Water Need Calculator
Calculate how many gallons per week your lawn needs based on square footage and irrigation efficiency. Apply the 1-inch-per-week rule accurately.
Low-Flow Faucet Savings Calculator
Calculate annual water and cost savings from installing low-flow faucet aerators. Compare old and new GPM to quantify your conservation gains.
Low-Flow Showerhead Savings Calculator
Calculate annual water and cost savings from switching to a low-flow showerhead. Compare old and new GPM ratings to see your savings.
Low-Flow Toilet Savings Calculator
Calculate annual water and cost savings from upgrading to a low-flow or high-efficiency toilet. Compare gallons per flush to see your savings.
Monthly Water Usage Calculator
Estimate your monthly water consumption in gallons. Enter your daily water usage to see total monthly gallons and compare against averages.
Pool Water Cost Calculator
Calculate the cost to fill and maintain a swimming pool. Estimate initial fill cost plus annual water expenses for top-offs and maintenance.
Rain Barrel Sizing Calculator
Determine how many rain barrels you need based on target collection volume and barrel capacity. Size your system for optimal rainwater storage.
Reverse Osmosis System Cost Calculator
Calculate the annual operating cost of a reverse osmosis system including membrane replacements, pre/post filters, wasted water, and electricity.
Virtual Water Calculator
Calculate the total virtual water in your daily consumption of food, beverages, and goods. Understand the hidden water cost of your lifestyle.
Water Bill Estimator Calculator
Estimate your total water bill including base charges, volume charges, sewer fees, and taxes. Get a complete breakdown of all line items.
Water Conservation Savings Calculator
Calculate the total water and dollar savings from adopting multiple conservation measures. Combine low-flow fixtures, efficient irrigation, and behavioral changes.
Water Cost Calculator
Calculate the cost of water based on volume and your utility rate. Enter gallons or cubic feet and price per unit to find your total water cost.
Water Filter Cost Calculator
Calculate the annual cost of a home water filtration system including filter replacements, system amortization, and per-gallon cost vs bottled water.
Water Footprint (Diet) Calculator
Estimate the water footprint of your diet based on food types and quantities. See how many gallons of water are embedded in your daily meals.
Water Footprint (Product) Calculator
Estimate the virtual water embedded in everyday products. Discover how much water it takes to produce clothing, electronics, paper, and more.
Water Heater Energy Calculator
Calculate the energy cost to heat water. Enter gallons, temperature rise, and heater efficiency to find kWh or therms and total cost.
Water Softener Cost Calculator
Calculate the annual operating cost of a water softener including salt, regeneration water, electricity, and system amortization.
Well Water Testing Cost Calculator
Estimate the total cost of private well water testing based on the number and types of tests required. Plan your annual testing budget.
Waste
6 calculatorsWaste audit, food waste, landfill diversion, and management cost calculators.
Composting Savings Calculator
Calculate how much money you save by composting organic waste instead of sending it to landfill. Includes disposal cost savings and compost value.
Dumpster Sizing Calculator
Calculate the right dumpster size and pickup frequency for your waste volume. Compare 2-yard to 8-yard containers and avoid overpaying.
Food Waste Carbon Footprint Calculator
Calculate the CO2 emissions from your food waste. See the greenhouse gas impact of wasted food sent to landfill and the savings from composting.
Landfill Diversion Rate Calculator
Calculate your landfill diversion rate by entering recycled, composted, reused, and total waste amounts. Track progress toward zero-waste goals.
Waste Audit Calculator
Perform a waste audit by entering weights for each waste stream. Calculate the percentage breakdown of landfill, recycling, compost, and other streams.
Waste Management Cost Calculator
Calculate total waste management costs including pickup fees, disposal rates, recycling fees, and dumpster rental. Budget for residential or commercial waste.
Recycling
3 calculatorsRecycling rate, revenue, and e-waste recovery calculators.
E-Waste Recycling Value Calculator
Estimate the recovery value of recycling electronics. Enter device counts to see the material value recovered minus processing costs.
Recycling Rate Calculator
Calculate your recycling rate as a percentage of total waste. Track household or business recycling performance and set improvement targets.
Recycling Revenue Calculator
Estimate revenue from selling recyclable materials. Enter tons and market prices for paper, plastic, glass, metal, and cardboard.
Sustainability
2 calculatorsZero-waste tracking and reusable vs disposable break-even calculators.
Reusable vs Disposable Break-Even Calculator
Calculate how many uses it takes for a reusable item to break even versus disposable alternatives. Compare bags, bottles, cups, and containers.
Zero-Waste Goal Tracker Calculator
Track your progress toward zero-waste goals. Enter your current diversion rate and target to see how far you have come and what remains.
General
31 calculatorsEnvironmental science, ecology, and general energy and sustainability calculators.
AI Water Footprint Calculator
Calculate the water consumption of AI model training and inference. Estimate cooling water usage for data centers running large language models and ML workloads.
Benzo[a]pyrene Exposure Calculator
Calculate benzo[a]pyrene (BaP) exposure from dietary, environmental, and occupational sources. Estimate cancer risk, compare exposure pathways, and understand safe exposure limits.
Books vs E-Books Calculator
Compare the environmental impact of physical books versus e-readers and e-books. Calculate carbon footprint, material use, and break-even point for switching to digital reading.
Car vs Bike Calculator
Compare the true cost and environmental impact of driving vs. cycling for your commute. Calculate savings in fuel, maintenance, health, emissions, and time for car versus bicycle.
Cigarette Butts Pollution Calculator
Calculate the environmental impact of cigarette butt waste. Estimate water pollution, chemical leaching, microplastic release, and cleanup costs from discarded cigarette filters.
CO₂ Breathing Emission Calculator
Calculate how much carbon dioxide you exhale daily and annually. Compare human breathing CO₂ output with other emission sources and understand respiratory carbon cycles.
COVID Pollution Calculator
Calculate the environmental impact of COVID-19 pandemic waste. Estimate pollution from disposable masks, gloves, test kits, and PPE discarded during and after the pandemic.
Cryptocurrency Footprint Calculator
Calculate the environmental impact of cryptocurrency mining and transactions. Estimate energy consumption, carbon emissions, and water usage for Bitcoin, Ethereum, and other crypto.
Drip Faucet Calculator
Calculate how much water and money a dripping faucet wastes over time. Enter drip rate to see daily, monthly, and annual water loss, utility costs, and environmental impact.
Eco-Friendly Bags Calculator
Compare the environmental impact of different bag types: plastic, paper, cotton, jute, and reusable. Calculate break-even uses, carbon footprint, and total lifecycle impact per bag type.
Fish Mercury Calculator
Calculate mercury exposure from seafood consumption. Check intake against EPA/FDA guidelines, see which fish are safest, and get personalized recommendations for pregnant women, children, and adults.
Flight Emissions Calculator
Calculate the carbon footprint of air travel. Estimate CO₂ emissions per passenger for any flight based on distance, class, aircraft type, and radiative forcing effects.
Global Plastic Policy Calculator
Model the environmental impact of different plastic reduction policies. Compare bans, taxes, EPR schemes, and recycling mandates on plastic waste, ocean pollution, and emissions.
Hand Dryers vs Paper Towels Calculator
Compare the environmental impact, cost, and hygiene of hand dryers versus paper towels. Calculate carbon emissions, waste, energy use, and annual costs for restroom drying methods.
Hydroelectric Power Calculator
Calculate hydroelectric power generation from water flow and head height. Estimate turbine output, annual energy, capacity factor, and revenue for micro to large-scale hydro installations.
Kaya Identity Calculator
Explore the Kaya Identity equation to understand drivers of global CO₂ emissions. Model how population, GDP, energy intensity, and carbon intensity interact to determine total emissions.
Lotka-Volterra Equations Calculator
Model predator-prey population dynamics using the Lotka-Volterra equations. Simulate oscillating populations, explore equilibria, and visualize classic ecological cycles.
Meat Footprint Calculator
Calculate the environmental impact of your meat consumption. Estimate CO₂ emissions, water usage, and land use for beef, pork, chicken, and other animal products.
Olympic Games Sustainability Calculator
Calculate the environmental footprint of hosting the Olympic Games. Estimate carbon emissions, waste generation, venue construction impact, and compare sustainability metrics across hosting strateg...
Passive House Calculator
Calculate heating/cooling energy demand for a Passive House design. Model insulation, airtightness, heat recovery, and solar gains to see if your building meets Passivhaus certification criteria.
PHEV Economy Calculator
Calculate plug-in hybrid electric vehicle fuel and electricity costs. Compare PHEV operating costs to conventional and EV alternatives based on your driving patterns and charging habits.
Plastic Footprint Calculator
Calculate your personal plastic consumption and waste. Estimate how much single-use plastic you generate weekly from packaging, bottles, bags, and everyday items.
Reduce Your Plastic Calculator
Calculate how much plastic waste you can eliminate with simple lifestyle swaps. See the annual savings from reusable bags, bottles, straws, containers, and shopping habits.
Shannon Diversity Index Calculator
Calculate the Shannon-Wiener diversity index and evenness for ecological communities. Enter species abundances to measure biodiversity, compare communities, and understand ecological health.
Solar Panel Wattage Calculator
Calculate the solar panel wattage and number of panels needed for your home or project. Estimate daily energy production, system size, costs, and payback period based on your location.
Tap Water Calculator
Calculate the cost and environmental impact of tap water vs bottled water, filtered water, and other drinking water options. Compare monthly costs, plastic waste, and carbon footprint.
Tree Benefits Calculator
Calculate the environmental and economic value of trees. Estimate CO₂ sequestration, air pollution removal, stormwater capture, energy savings, and property value increase from urban and residential trees.
Vegan Footprint Calculator
Calculate the environmental savings of a vegan diet vs. omnivore. Estimate reductions in CO₂ emissions, water use, land use, and animal lives saved by going plant-based.
Water Demand Calculator
Calculate total water demand for residential, commercial, or agricultural use. Estimate daily, monthly, and annual water needs based on population, climate, irrigation, and usage patterns.
Wind Turbine Profit Calculator
Calculate the profitability of a wind turbine installation. Estimate annual energy production, revenue, operating costs, payback period, and ROI for residential to commercial turbines.
Zero Waste Christmas Tree Calculator
Compare the environmental impact of real vs. artificial Christmas trees. Calculate carbon footprint, waste, water use, and total cost over years to find the most eco-friendly option.