# Electricity Carbon Footprint Calculator

URL: https://speedycalculator.com/calculators/ecology/electricity-co2/
Last updated: 2026-10-25

> The electricity carbon footprint calculator estimates CO₂ emissions from your electricity use, using your grid’s emission factor in kg CO₂ per kWh. It shows monthly and yearly emissions.

## Inputs

- Electricity used per month (kWh)
- Grid emission factor (kg CO₂/kWh) — About 0.4 is near the world average; check your utility or national data.

## Results

- CO₂ per month
- CO₂ per year

## Formula

```
CO₂ = kWh × grid emission factor
```

## Explanation

Emissions per kWh depend on how your country generates power: coal-heavy grids emit far more than hydro or nuclear grids.

### How to use the Electricity Carbon Footprint Calculator

- **Electricity used per month**
- **Grid emission factor** — About 0.4 is near the world average; check your utility or national data.

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Multiply electricity used by the emission factor for your grid.

### Inputs explained

FieldWhat to enterElectricity used per monthIn kWhGrid emission factorIn kg CO₂/kWh. About 0.4 is near the world average; check your utility or national data.

### What each result means

- **CO₂ per month** = [Electricity used per month]×[Grid emission factor]
- **CO₂ per year** = [CO₂ per month]×12

### Example values

How the main result changes when **Electricity used per month** changes and everything else stays at the example values above:

Electricity used per month (kWh)CO₂ per month (kg)1506022590300120375150450180600240

## Worked example

Inputs — Electricity used per month: 300 kWh; Grid emission factor: 0.4 kg CO₂/kWh.

Results — **CO₂ per month = 120 kg**; CO₂ per year = 1,440 kg.

## FAQ

**Where do I find my grid’s factor?**
National energy agencies and utilities publish them; the IEA reports factors by country.

**Does rooftop solar count?**
Subtract the solar energy you use from kWh.

**What formula does the Electricity Carbon Footprint Calculator use?**
CO₂ = kWh × grid emission factor.


## Sources

- [IEA – Emissions factors](https://www.iea.org/data-and-statistics/data-product/emissions-factors-2024)