Scope 1-3 emissions, GHG protocol, and fuel carbon calculators. Browse our free emissions tools below — all calculators are instant, accurate, and require no sign-up.
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.
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.
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.
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 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 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.