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.