Work out vehicle kilometres travelled instantly with clear inputs, formula shown and shareable results.
Vehicle kilometres travelled is the fundamental exposure measure for transport: vehicles times trips times average trip length. It drives fuel consumption, emissions, crash exposure and road wear, and expressing carbon at around 120 grams per kilometre for a modern petrol car turns it into a climate figure.
Vehicle kilometres
Daily VKT = vehicles x trips per vehicle x average trip length; annual = daily x days
Emissions
Tonnes CO₂ = annual VKT x emission factor in kg per km / 1000
Daily VKT = vehicles x trips per vehicle x average trip length; annual = daily x days. Vehicle kilometres travelled is the fundamental exposure measure for transport: vehicles times trips times average trip length.
Because impact scales with distance travelled, not with ownership. A policy that cuts trip lengths reduces emissions and crashes even if the number of vehicles is unchanged.
This calculator takes 4 inputs: Number of vehicles, Average trip length, Trips per vehicle per day, Days per year. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.