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Vehicle Kilometres Travelled Calculator

Work out vehicle kilometres travelled instantly with clear inputs, formula shown and shareable results.

About Vehicle Kilometres Travelled Calculator

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.

Formulas

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

Worked example

With the default values below, Vehicle Kilometres Travelled Calculator returns Annual vehicle kilometres travelled of 65,700,000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Number of vehiclesminimum 1
5,000
Average trip lengthminimum 0.1 km
12 km
Trips per vehicle per dayminimum 0.1
3
Days per yearminimum 1 days
365 days

Results

Annual vehicle kilometres travelled
65,700,000 km
Daily vehicle kilometres
180,000 km
Annual kilometres per vehicle
13,140 km
Estimated annual CO₂ at 120 g/km
7,884.0 t

Step by step

  1. 1Values used
  2. 2Vehicle kilometres
  3. 3Emissions
  4. 4Annual vehicle kilometres travelled= 65,700,000 km
  5. 5Daily vehicle kilometres= 180,000 km
  6. 6Annual kilometres per vehicle= 13,140 km
  7. 7Estimated annual CO₂ at 120 g/km= 7,884.0 t

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or fees or charges into account.
  • Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Vehicle Kilometres Travelled figure worked out?

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.

Why is VKT preferred over vehicle count for policy?

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.

What values do I need to enter?

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.

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