About the CO₂ Emission Calculator
Every activity carries a carbon cost — some far larger than they feel.
This tool estimates the emissions of a single activity so you can compare choices.
How this calculator works
We multiply your activity amount by a standard emission factor to estimate kilograms of CO₂.
Why it matters
- Compare travel options
- Understand hidden emissions
- Support offsetting decisions
- Make lower-carbon choices
Frequently asked questions
A typical petrol car emits around 0.17 kg of CO₂ per kilometre.
Yes — a single long-haul return flight can rival a year of driving.