Electricity Footprint Calculator

Estimate CO₂ from your electricity use.

Yearly CO₂ 2,400

Yearly CO₂ (tonnes) 2.4

Formula: CO₂ = kWh/month × 12 × factor ÷ 1000

Step-by-step with your numbers:

1. Values used:

2. Electricity per month = 500 kWh

3. Grid CO₂ factor = 400 g/kWh

5. Yearly CO₂ = 2,400

6. Yearly CO₂ = 2.4tonnes

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Estimate the carbon footprint of your electricity use.

The math behind it

CO₂ (kg) = monthly kWh × 12 × grid factor (g/kWh) ÷ 1000. Grid factors vary from ~50 (clean) to ~700 (coal).

500 kWh/mo at 400 g/kWh → 2,400 kg/year.

Your grid factor?

Check your utility or country's average; renewables lower it.