Tool · calculator
Boat fuel consumption – litres per nautical mile and cost
Litres per hour ÷ speed = litres per nautical mile.
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Litres per nautical mile
Fuel for the trip
Trip cost
Range with reserve
Worked example
| Fuel consumption and speed | Litres per nautical mile | Litres for the trip | Cost |
|---|---|---|---|
| 5 l/h at 6 knots | 0.83 | 25 | 500 kr |
| 10 l/h at 7 knots | 1.43 | 42.9 | 857 kr |
| 20 l/h at 20 knots | 1 | 30 | 600 kr |
| 30 l/h at 25 knots | 1.2 | 36 | 720 kr |
| 50 l/h at 30 knots | 1.67 | 50 | 1,000 kr |
| 80 l/h at 35 knots | 2.29 | 68.6 | 1,371 kr |
How we calculate
Litres per nautical mile = consumption (l/h) ÷ speed (knots). Fuel for the trip = litres per nautical mile × distance. Range = tank volume × (1 − reserve) ÷ litres per nautical mile. Consumption varies a lot with speed, load, sea state and hull fouling; ideally measure your own.