Usable fuel0 gal
Estimated range0 mi
Boat Fuel Range Calculator
Estimate how far a boat may travel on available fuel while keeping a reserve for wind, current, detours, and the return trip.
Boat fuel range decision card
What the result means
Range is an estimate from fuel, burn rate, speed, and reserve. Wind, current, load, trim, hull condition, and sea state can reduce it.
What to do next
Use the result to set a conservative turnaround point and compare fuel burn with weight and battery needs.
When to round
Round range down and reserve up when running offshore, against current, or with changing weather.
Real-world examples
Lake run
Inputs: 24 gallons, 25% reserve, 6 gal/hr, 28 mph. Result: about 84 miles theoretical range. Interpretation: plan a shorter route; next step is checking fuel stops.
Heavy-load fishing day
Inputs: 18 gallons, 30% reserve, 5 gal/hr, 20 mph. Result: about 50 miles. Interpretation: load and reserve cut range; next step is checking boat capacity.
How to use this calculator
- Enter the fuel available, expected fuel burn, and reserve amount.
- Use realistic speed and fuel-use numbers from your boat, motor, and load.
- Compare calm-water and rough-water scenarios before leaving.
- Keep a conservative reserve instead of planning to use the full tank.
Example uses
Fishing run
Estimate whether a long run to a fishing spot leaves enough fuel to return.
Lake cruising
Plan a route with several stops while preserving reserve fuel.
Weather margin
Compare range when wind or current increases fuel burn.
Helpful notes
- Boat fuel burn changes with load, trim, hull condition, prop, wind, current, waves, and speed.
- Use this for planning only and verify fuel needs with your own boat records.
- Carry a margin and follow safe boating practices.