Electricity Carbon Footprint Calculator

About this calculator

Electricity itself doesn't emit CO2 at the point of use, but generating it does — the amount depends entirely on the generation mix feeding the grid, which is why emissions per kilowatt-hour vary widely between a coal-heavy grid and one dominated by hydro, nuclear, or renewables. That relationship is captured in a single number, the grid's emission factor (typically in kg CO2 per kWh), published by grid operators or national energy agencies.

This calculator multiplies electricity used (in kWh) by that emission factor to estimate total CO2 output, then converts it into tons and an equivalent number of trees needed to offset it over their growth. It's used by homeowners and businesses tracking their carbon footprint, and by anyone comparing how their emissions would change if they used a different, greener electricity source or supplier.