How to use it
Choose your fuel-economy unit (L/100 km, km/L or mpg), then enter the trip distance, your car's economy and the fuel price. Tick Round trip to double the distance, and set the number of people to split the cost.
Getting an accurate number
Real-world economy varies with speed, load, traffic and weather. Use your car's average from the trip computer for the best estimate.
Frequently asked questions
How do I convert mpg to L/100 km?
Divide 235.2 by the mpg figure (US gallons). For example 30 mpg is about 7.8 L/100 km.
Does it work in any currency?
Yes — the maths doesn't depend on currency; enter the price per litre or gallon in whatever currency you use.
