Interactive tool
Boat fuel cost estimator
Plan your next trip with realistic fuel numbers. Enter your boat's burn rate, cruise speed, trip distance, and local fuel price — get gallons needed, total cost, time underway, and efficiency in nautical miles per gallon.
Quick presets
Adjust any field after picking a preset. All calculations update live.
Gallons per hour at your cruising throttle, not WOT.
Comfortable cruise speed — typically best-economy throttle.
One-way or round-trip distance to estimate.
Marine fuel prices often run higher than roadside.
Reading your fuel numbers
Most planing boats hit their best economy just after getting on plane — usually mid-throttle. Pushing the last few knots toward wide-open throttle can double fuel burn for a marginal speed gain. NMPG (nautical miles per gallon) is the most useful figure for comparing boats and throttle settings: higher is better. On long trips, plan to arrive with one-third of your fuel still in the tank — the old "thirds rule" (a third out, a third back, a third reserve) still applies. Always recheck burn numbers after prop or load changes; an under-propped or overloaded boat burns far more than the brochure figure.