Free to use
Carbon calculators
Every calculator below is free, runs on official emission factors (UK DESNZ 2026, Agribalyse, The Big Climate Database), and computes server-side — each line of your result is labelled with the factor and source that produced it.
- Commuting footprintYour regular journey to work, annualised.Start
- Event footprintConferences and events: travel, venue, catering, materials, waste.Start
- Food footprintYour shopping basket and diet pattern, from official food databases.Start
- Freight footprintGoods transport by road, rail, sea or air — mass × distance.Start
- Home energy footprintElectricity, gas, heating oil and LPG for your household.Start
- Hotel stays footprintRoom-nights by country, using official per-night factors.Start
- Travel footprintFlights, trains, cars, buses and taxis — one trip or a whole year of travel.Start
Wondering where the numbers come from? Browse the emission factors or read the methodology.