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