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Fuel Cost Calculator: Litres, Trip Cost & Sharing
Estimate trip fuel usage, total fuel cost and cost per passenger.
Estimate the fuel used on a route and divide the cost among a whole number of travellers. Enter the fuel price in your own currency; the calculator does not convert currencies.
Formula: Litres = distance × L/100 km ÷ 100. Total cost = litres × price per litre. Cost per person = total cost ÷ people sharing.
Example: 300 km at 8 L/100 km uses 24 litres. At 1.50 per litre, the trip costs 36.00. Four people share 9.00 each.
This is a metric estimate. Enter the whole trip distance, including the return leg if needed. It excludes tolls, parking, maintenance and vehicle depreciation.
Go to calculatorMethod, examples and limits
Use consumption for the actual journey
A manufacturer test figure is a useful starting point, but congestion, hills, speed, tyres, weather and vehicle load change real consumption. If you know the litres bought and distance covered over a comparable route, calculate litres ÷ kilometres × 100 to obtain your own L/100 km estimate.
Plan a return trip
For a 150 km outbound route and an equal return, enter 300 km. At 8 L/100 km, that uses 24 litres, not 12. If the return distance differs, add both distances before calculating. To compare alternate routes, calculate fuel cost for each route and then add any toll or parking differences separately.
Compare a realistic range
For the same 300 km trip at 1.50 per litre, consumption of 7 L/100 km costs 31.50, while 9 L/100 km costs 40.50. This range is more useful than treating 36.00 as a guaranteed fuel bill. Enter a higher or lower consumption figure to see how sensitive the estimate is.
Share costs without hiding assumptions
Passengers is the number of people sharing the bill, including the driver if they contribute. It must be a whole number of at least one. Equal sharing does not account for passengers who travel only part of the route. Agree that split separately rather than assuming the displayed amount is fair for every arrangement.
Keep units and currency consistent
An efficiency figure in miles per gallon cannot be entered directly into the L/100 km field. Convert it first and distinguish US from imperial gallons. Use one currency for the fuel price; the output remains in that currency. Very small costs may display as 0.00 after two-decimal currency rounding.
Maintained by: Muhammad Bhutto · Updated: 2026-10-16. Checking methodology · Report an error