Carpool Cost Splitter

Share fuel, toll and parking costs fairly among carpool riders.

Round-trip distance	40 km
Fuel economy unit	mpg (US)
Fuel economy	30
Fuel price (per litre; per gallon in the US)	$3.2
Tolls and parking per trip	$0
People sharing (including driver)	3

Round-trip distance

Fuel economy unit

Fuel economy

Fuel price (per litre; per gallon in the US)

Tolls and parking per trip

People sharing (including driver)

Each person pays per trip

$0.88

The trip costs $2.65 in fuel, tolls and parking, split 3 ways.

Per person, 20 trips a month: $18

Each person's share with more people

1 person$2.65
2 people$1.33
3 people$0.88
4 people$0.66

About the Carpool Cost Splitter

Enter the round-trip distance, the car's fuel economy in whatever unit it shows, the fuel price, any tolls and parking per trip, and how many people share. The calculator gives each person's share per trip and per month of commuting.

Splitting the running cost of a shared journey keeps carpooling fair. Some groups also add a little per km for wear and tear.

The formula

Each pays = (fuel + tolls + parking) ÷ people

Worked example

A 40 km round trip in a car doing 15 km per litre, fuel ₹103, 4 people

Fuel: 40 ÷ 15 = 2.67 litres = ₹274.67
Each person: ₹68.67 per trip
About ₹1,373 each for 20 trips a month

Questions people ask

Should the driver pay a share?

Usually yes, as here; some groups exempt the driver to cover wear on the car.

Is charging passengers legal?

Cost-sharing is generally fine; making a profit may need a commercial licence.

What about a detour to pick someone up?

Use the full distance driven; a long detour can be split by distance instead of equally.