How to Calculate Truck Mileage
Last Updated: August 2026
Truck mileage (km per litre) tells you whether diesel is working for the route—or disappearing. Calculate it the same way every week so trucks are comparable.
Summary
Truck mileage = kilometres run ÷ diesel litres filled for the same period. Use trip odometer and fill records, not memory.
Formula
Mileage (km/l) = Total km run ÷ Total diesel litres filled for the same date range and the same vehicle.
Data you need
- Opening and closing odometer (or trip km sum)
- Diesel litres filled in the same window
- Notes for empty vs loaded runs if you want route-quality mileage
Example
Truck RJ14… runs 2,400 km in a week and fills 600 litres → mileage = 2,400 ÷ 600 = 4.0 km/l.
Common mistakes
- Mixing two trucks’ slips
- Counting litres without matching km
- Ignoring long idle / generator use if tracked separately
Related product: Diesel management software
Frequently asked questions
What is a good truck mileage? It depends on load, route, and truck type. Compare each truck to its own history and to peers on similar routes.
Should I calculate daily or weekly? Weekly is steadier; trip-wise is better when you need variance control.