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Carbon Footprint Calculator

Estimate your annual personal CO₂e footprint from home energy, driving, flying, and diet — with adjustable emission factors.

Priya Venkatesan By Priya Venkatesan
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

kWh/yr
km/yr
L/100km
hr/yr

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Total = Σ (activity × emission factor). Electricity ≈ 0.40 kg CO₂e/kWh, petrol car ≈ 2.31 kg/L, short-haul flight ≈ 0.255 kg/km, mixed diet ≈ 2.5 t/yr.

In depth

Estimate your annual personal CO₂e footprint from home energy, driving, flying, and diet — with adjustable emission factors.