Free tool

Personal Emissions Calculator

Get a rough picture of your personal carbon footprint across home energy, diet, and shopping, in tonnes of CO₂e per year. Measurement follows the GHG Protocol with emission factors from UK DEFRA / BEIS and the US EPA (2023).

This is an estimate, useful for planning and offsetting, but not a compliance-grade lifecycle assessment.

Estimate, not a compliance tool

Home electricity

Total annual kWh from your utility bill, plus the grid you're on.

Electricity gridElectricity used

kWh / yr

Typical US household: ~10,500 kWh/yr

Home heating

Pick the fuel that heats your home.

Heating fuelAnnual consumption

therms

Enter your yearly total in therms

Diet

Rough annual diet footprint. Pick the closest match.

Eating style

Based on average per-capita food-system emissions by diet pattern.

Shopping & consumption

Clothing, electronics, furniture and general goods.

Shopping habits

A coarse annual estimate. Refine with the business calculator for supply-chain detail.

Based on GHG Protocol methodology. Factors sourced from UK DEFRA / BEIS and US EPA (2023 updates). For business-scale emissions accounting, use our business calculator.