Science & Environment
Household Carbon Footprint Calculator
Estimate annual CO2 emissions from household electricity and natural gas usage.
Your inputs
Change any value to update the result instantly.
Total household CO2
6.85 t CO2/yr
Electricity emissions
4.2 t CO2
Natural gas emissions
2.65 t CO2
Monthly average
570.8 kg CO2/month
Formula and working
CO2 = electricity_kWh × grid factor + gas_therms × 5.3 kg CO2/therm
- 1
Collect the inputs
Annual electricity use = 10,000 kWh; Grid emission factor = 0.42 kg CO2/kWh; Annual natural gas use = 500 therms
- 2
Apply the formula
CO2 = electricity_kWh × grid factor + gas_therms × 5.3 kg CO2/therm
- 3
Result
Total household CO2 = 6.85 t CO2/yr
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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