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.
Free Emissions Calculators
14 toolsScope 1-3 emissions, GHG protocol, and fuel carbon calculators. Browse our free emissions tools below — no sign-up required.
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.