Skip to content
Calculator Tools
Environment Calculators

Fuel CO2 Calculator

CO₂ emitted by burning petrol, diesel, gas or heating oil, per litre and per journey.

Enter values

Results update as you type.

Result

CO₂ emitted

2,772 kg

In tonnes
2.772
Emission factor
2.31 kg per unit
Per month
231 kg
Trees to offset
132
Equivalent electricity at 233 g/kWh
11,897 kWh

About the Fuel CO2 Calculator

CO₂ emitted by burning petrol, diesel, gas or heating oil, per litre and per journey.

Also known as: petrol co2 calculator, diesel emissions, fuel emissions calculator, co2 per litre.

How to use this calculator

  1. Enter fuel, amount used.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

kg CO₂ = litres × emission factor

Worked example

Using the values pre-filled in the calculator above:

  • Fuel: Petrol (2.31 kg/L)
  • Amount used = 1,200 litres or kWh per year

the calculator returns:

  • CO₂ emitted: 2,772 kg
  • In tonnes: 2.772
  • Emission factor: 2.31 kg per unit
  • Per month: 231 kg