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 Electricity Calculators
27 toolsAppliance energy use, power conversion, and electricity cost calculators. Browse our free electricity tools below — no sign-up required.
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.