Car & Vehicle

Carpool Cost Calculator

Split the fuel and tolls of a shared journey between everyone in the car, driver included.

10 inputs Free, no sign-up

Your figures

Use the figure you actually get, not the showroom one. City driving commonly lands 20-30% below a rated number, and the mileage calculator works yours out from a tank.

The price you actually paid. Pump prices move daily and differ by several rupees between states, so the round number here is a placeholder, not a quote.

Including the driver.

Tick to count the journey twice.

Try an example

Result

Your result

Enter your figures and the result appears here.

Estimates only. Rates, fees and specifications change. Confirm against the official source before you rely on a figure — see our disclaimer.

About this calculator

The arithmetic of a carpool is trivial; the disagreement it settles is not. Work out what the journey cost, divide by the people in the car, and the number is no longer anybody's guess.

This page counts the driver as one of the shares, because the driver is also getting to the destination. If your arrangement is that the passengers cover the whole trip, the result shows that total too.

How to use this calculator

  1. Enter the distance and tick "there and back" if that is the journey.
  2. Enter the car's mileage and the pump price.
  3. Say how many people are in the car, including the driver.
  4. Add tolls and parking if there were any.

The formula

Fuel used  = Distance / Mileage
Trip cost  = Fuel used x Price + Tolls + Parking + Anything else
Each share = Trip cost / People in the car

Dividing by the number of people rather than the number of passengers is a choice, and it is the usual one: everyone in the car is getting the same journey. Dividing by one fewer means the passengers are paying for the driver's travel as well as their own.

SymbolMeaningUnit
Distance Distance of the journey km or mi
People People in the car, driver too
Tolls Tolls paid on the route ₹

Worked example

180 km each way at 16 km/L, petrol at ₹100, ₹340 of tolls, four people:

Distance  = 180 x 2      = 360 km
Fuel used = 360 / 16     = 22.5 litres
Fuel cost = 22.5 x 100   = 2,250
Trip cost = 2,250 + 340  = 2,590
Each      = 2,590 / 4    = 647.50

Notes and limits

  • Fuel and tolls are the costs everyone accepts. Wear, tyres and the value the car loses are just as real and rarely get mentioned — if you want them shared, add a figure under "anything else". The cost per km calculator works one out.
  • A car with four people in it uses slightly more fuel than the same car with one. The difference is small compared with the saving of not taking four cars.
  • Rounding to a convenient note is the usual courtesy. The exact figure is here if anyone wants it.
  • Doing the same shared trip regularly? Take the monthly total rather than settling up each time — the monthly fuel cost calculator gives it.

What this calculation assumes

  • The driver is counted as one of the shares.
  • Only the costs you entered are shared. Wear and depreciation are not included unless you add them.

Frequently asked questions

How should we split the cost of a carpool?

Add the fuel and the tolls, then divide by the number of people in the car including the driver. That treats everyone as getting the same journey, which is the arrangement most people find fair.

Should the driver pay a share?

On the usual arrangement, yes - they are travelling too. The alternative, where passengers cover the whole trip, is really payment for the use of the car as well as the fuel, and the result shows that total so you can choose.

What about wear and tear on the car?

It is a real cost and is not in the fuel figure. Work out a per-kilometre maintenance figure and add it under "anything else" if the group wants it shared.

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