Outboard Fuel Economy Calculator | Marine Fuel Efficiency Tool
Calculate fuel consumption and efficiency for outboard motors. Optimize your boat's fuel economy with our marine fuel calculator.
How to Use
- Enter the engine power in horsepower
- Enter your cruising speed in knots
- Enter the planned running time in hours
- Click Calculate to get fuel consumption estimates
Note: Actual fuel consumption may vary based on conditions, load, and engine maintenance.
Planning a trip? Get the offline Fuel & Range Planner
Fuel burn, range, tank capacity and trip cost. Offline in Excel or Google Sheets. From A$19.99 (approx. US$12).
See what's insideFrequently Asked Questions
What is good fuel economy for a boat?
Fuel economy varies hugely by boat type. A displacement cruiser might use 2-4 L/NM, a planing boat 4-10 L/NM, and a high-performance boat 15+ L/NM. Speed is the biggest factor.
How can I improve my boat fuel economy?
Slow down (fuel use increases roughly with the cube of speed), keep the hull clean, trim properly, reduce weight, and ensure the propeller is correctly pitched.
How do I calculate fuel cost per nautical mile?
Multiply your fuel consumption in litres per nautical mile by the current fuel price per litre. This calculator shows L/NM at different speeds to help you plan.