Home Energy & CO₂ Calculator

Estimate electricity-related CO₂ emissions from your monthly usage. This is an approximate estimate; real emissions depend on your local grid mix.

Used for per-person estimates.
Check your utility bill for kWh.
Default is a rough global-ish average.
Optional: for cost estimate.
Only affects formatting.
Set a rough grid factor quickly.
How we calculate

CO₂ (kg) = kWh × grid emission factor (kg CO₂/kWh). Cost = kWh × price. Monthly values are multiplied by 12 for yearly estimates.