Measure a journey.
Ready to take a first step? Enter a trip and see what it costs in CO₂ — the first move towards reducing, and then offsetting, what you cannot avoid.
Calculate your carbon footprint.
Pick how you travelled and where. Distance is worked out from real airport and seaport coordinates; the emission comes from IntelliGrid's DEFRA service.
Why calculate a footprint at all?
A footprint check shows the real scale of an everyday impact. With that in view, small adjustments start to feel worth making.
See what a trip costs
Every trip by air, road, rail or sea produces greenhouse gases. This puts a number on the one you just took.
Find the biggest line
Measuring shows which journeys produce the most, which is the only reliable way to know what is worth changing.
Then act on it
Once the number exists you can change the journeys that drive it, and offset what is genuinely unavoidable.
How this calculator works.
- 01
Enter the trip
Choose the travel mode and the two ends of the journey, or type the distance. Airports and seaports resolve to real coordinates.
- 02
Distance, then emission
The distance is measured as a great circle between those points. The trip is then priced against DEFRA conversion factors.
- 03
Do something with it
Take the figure into the app to offset it against a named project, and keep the record of what was retired.
One trip is a start.
The app keeps the running total, and turns a single measurement into a habit worth having.