Fuel CO₂ Emissions Calculator
Calculate CO₂ emissions from burning petrol, diesel, LPG, or jet fuel by volume consumed.
How it works
- 1Select your fuel type — petrol, diesel, LPG, or kerosene — to load its emission factor in kg CO₂ per litre.
- 2Enter the volume of fuel consumed in litres; emissions are computed as litres × emission factor.
- 3Read your CO₂ output in kg and tonnes, plus the number of trees needed to sequester it over a year.
Use cases
- Estimate the carbon footprint of a road trip or flight based on fuel burn.
- Compare the emissions of different fuel types for the same journey distance.
- Calculate offset planting requirements for an individual or fleet fuel budget.
Frequently asked questions
Why does diesel produce more CO₂ per litre than petrol?
Diesel is denser and more carbon-rich than petrol. At roughly 2.68 kg CO₂/L vs 2.31 kg CO₂/L for petrol, burning one litre of diesel releases about 16 % more CO₂ by volume — though diesel engines are often more fuel-efficient per kilometre.
How is the tree offset figure calculated?
A mature tree sequesters approximately 21 kg of CO₂ per year. The calculator divides your total CO₂ (kg) by 21 to estimate how many trees, growing for one year, would absorb an equivalent amount.
Does this include upstream (well-to-tank) emissions?
No. The emission factors used here cover tailpipe (tank-to-wheel) CO₂ only — the direct combustion emissions. Upstream extraction, refining, and transport add roughly 15–25 % more on a lifecycle basis and are not included.
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