How it works
Calculate fuel economy from a measured distance and fuel quantity. Both outputs describe the same trip with inverse conventions.
km/L = distance/fuel; L/100 km = 100fuel/distance
Worked example
Show example inputs and result
Distance travelled: 600 · Fuel used: 45.
- Economy
- 13.33333333 km/L
- Consumption
- 7.5 L/100 km
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy