Free active-travel tool
Carbon Savings Calculator
Estimate the distance, fuel and direct vehicle emissions avoided when regular car journeys are replaced by cycling or walking.
Your avoided car journeys
How the estimate works
About this estimate: This tool provides an indicative personal estimate. It is not intended for formal organisational carbon reporting.
Distance avoided = return distance × journeys per week × active weeks.
CO₂e avoided = distance avoided × selected vehicle factor. Vehicle factors are direct operational emissions from the UK Government's 2026 greenhouse-gas conversion factors. They exclude vehicle manufacture, road infrastructure and the lifecycle impact of the replacement activity.
Fuel avoided uses the mpg value you provide. Fuel energy is an indicative estimate using 9.4 kWh per litre. Actual consumption varies with the vehicle, traffic, weather and driving style.