Home Energy Emissions Calculator

Calculate CO2 emissions from household energy including electricity, natural gas, heating oil, and propane.

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kWh
therms
gallons
gallons

Total Annual CO2

7.05 metric tons

Electricity CO24.51 metric tons
Natural Gas CO22.55 metric tons
Oil & Propane CO20.00 metric tons

Total Annual CO2 vs Monthly Electricity

View formula & how it works →

How to Calculate Home Energy Emissions

Home energy emissions come from the fuels used to power and heat your home.

Emission Factors

  • Electricity: 0.92 lbs CO2/kWh (US grid average)
  • Natural Gas: 11.7 lbs CO2/therm
  • Heating Oil: 22.4 lbs CO2/gallon
  • Propane: 12.7 lbs CO2/gallon

    • Formula

    Total CO2 = Sum of (Usage * Emission Factor) for each fuel / 2,204.6

    Example Calculation

    A home using 900 kWh/month electricity, 40 therms/month gas, no oil or propane.

    1. 01Electricity: 900 * 12 * 0.92 = 9,936 lbs CO2
    2. 02Natural Gas: 40 * 12 * 11.7 = 5,616 lbs CO2
    3. 03Total: 15,552 lbs / 2,204.6 = 7.06 metric tons/year

    Frequently Asked Questions

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