Calculate fuel burn rate, cruising range, navigation, boat sizing, and ownership costs for your boat — all for free. No signup, no guesswork.
Fuel burn rate, trip cost, cruising range, tank sizing, trolling consumption, MPG, annual fuel cost, and fuel flow calculators.
Nautical mile converter, speed/distance/time, true wind, anchor rode, current drift, channel depth, wave height, and visibility calculators.
Hull speed, displacement, max horsepower, trailer tongue weight, trailer capacity, boat capacity, and prop size calculators.
Annual cost of ownership, slip fees, winterization, insurance, boat loan payment, depreciation, and maintenance schedule calculators.
Calculate your boat engine fuel consumption in gallons per hour based on engine horsepower, RPM, and engine type. Know your burn rate before you leave the dock.
Estimate fuel cost for a boat trip based on distance, fuel consumption rate, and current fuel price. Plan your budget before casting off.
Calculate how far your boat can travel on a tank of fuel at various speeds. Factor in reserve requirements for safe trip planning.
Estimate your total annual boat fuel expense based on usage patterns, trip frequency, and fuel consumption. Budget accurately for the season.
Convert between nautical miles, statute miles, and kilometers. Essential for navigating between chart distances and GPS readings.
Calculate speed, distance, or time for marine navigation. Enter any two values to find the third. Works in knots and nautical miles.
Calculate the proper anchor rode length (scope) based on water depth, tidal range, and conditions. Get the right scope for safe anchoring.
Assess wave conditions for your boat size and type. Determine safe operating limits based on wind speed and fetch distance.
Calculate the theoretical hull speed of a displacement boat based on waterline length. Understand the speed limit imposed by hull design.
Calculate the USCG maximum horsepower rating for your boat based on length, beam, and transom height. Stay within safe power limits.