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Home Gas CO2 Emissions Calculator

Calculate CO2 emissions from domestic natural gas: heating, hot water, and cooking.

Sources: EPA — Greenhouse Gas Equivalencies Calculator · EIA — Natural Gas Data

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How the Home Gas CO2 Calculator Works

This tool calculates the carbon dioxide emissions (CO2) produced by natural gas consumption in your home. Residential gas heating is one of the main sources of household CO2 emissions.

The Natural Gas Emission Factor

According to the EPA, burning 1 therm of natural gas produces about 5.3 kg of CO2. One standard cubic meter (Smc) produces approximately 2.0 kg of CO2. These factors account for the complete combustion of methane.

Three Calculation Modes

You can enter data in three ways:

  1. Annual consumption in therms/Smc: the most accurate method if you know your usage from utility bills
  2. Monthly spending: the calculator estimates consumption by subtracting fixed costs and dividing by the average price
  3. Automatic estimate: based on average consumption data for your home type

How to Reduce Emissions

The most effective interventions to reduce home gas CO2 emissions are building insulation, replacing the gas furnace with an electric heat pump, and switching to an induction cooktop. Combining these measures can reduce gas emissions by 70-90%.

Frequently Asked Questions

How much CO2 does home natural gas produce?▼
Each standard cubic meter (Smc) of natural gas burned produces about 2.0 kg of CO2. An average household consuming 800 Smc/year generates about 1,600 kg of CO2 annually just for heating, hot water, and cooking.
Where can I find my gas consumption?▼
Your gas consumption is shown on your utility bill in the consumption summary section. You can also check your utility provider's online portal or app. Smart meters display consumption directly on the device.
How can I reduce my home gas CO2 emissions?▼
The most effective strategies are: adding insulation (30-50% consumption reduction), replacing the gas furnace with an electric heat pump (near-total gas elimination), installing a smart thermostat, improving windows, and reducing the thermostat by 1-2 degrees.