For most travellers, flying is the single biggest part of their carbon footprint. Enter your route and cabin class and the free, expert-backed Sustrax flight calculator shows the emissions of your trip in seconds, so you can compare options, plan reductions and offset what remains.
Choose your departure and arrival airports, cabin class and whether you are flying one way or return. Add as many legs as your journey needs and the calculator totals the emissions as you go.
A single long-haul return flight can produce more carbon than months of everyday commuting, home energy use and food combined. Knowing the number is the first step: it lets you weigh a direct flight against a connection, economy against business class, or a flight against the train.
The calculator is built and maintained by the Carbon Footprint Ltd team, using the same expert-backed emission factors that underpin our professional carbon assessments for airlines, airports and corporate travel programmes.
A flight footprint is most useful when it leads somewhere. Plan the whole trip, report it for your business, balance what you cannot avoid, or give your own visitors the same tool.
Flights are only part of the picture. The Holiday Carbon Calculator walks you through transfers, accommodation and spending on food and activities, step by step.
Try the holiday calculator Business TravelLog business flights alongside energy, vehicles and public transport in Sustrax Lite, free for a single site, or scale up to Sustrax MX for team-wide travel reporting.
Explore the business calculator Take ActionOnce you know your flight footprint, compensate for it by supporting high-impact, verified carbon projects through our Carbon Marketplace.
Visit the Marketplace For Your WebsiteTravel companies, airports, universities and charities can add the flight calculator to their own website with a ready-to-copy embed code. It is free, responsive and resizes automatically.
Get the embed codeCopy the free Sustrax flight calculator embed code and paste it into your own page. The holiday, personal and business calculators are available from the same page.