Skip to main content
Calcimator

Marine Fuel Consumption Calculator

Calculate fuel needed, trip time, cost, and range for your boat based on engine specs, speed, and distance.

Inputs

HP
knots
GPH
nm
$/gal

Results

Fuel Needed

30 gal

≈ 6 buckets

Trip Time2.5 hrs
Fuel Cost$165.00
Estimated Range25 nm
Efficiency1.67 nm/gal
10% Reserve3 gal
Total Fuel (with reserve)33 gal
How to Use This Calculator
  1. Enter your engine's horsepower and your typical cruising speed in knots.
  2. Input the fuel burn rate in gallons per hour (GPH) at cruise — check your owner's manual.
  3. Enter the trip distance in nautical miles and current marine fuel price per gallon.
  4. Review total fuel needed, trip time, and fuel cost for the voyage.
  5. Use the 10% reserve output to ensure you carry adequate fuel for safety.

How the result changes with Fuel Burn Rate

Fuel Burn RateFuel Needed
2050 gal
70175 gal
130325 gal
180450 gal

What each input means

Engine Horsepower
Total engine horsepower of your boat.
Cruising Speed
Average cruising speed in knots.
Fuel Burn Rate
Gallons per hour consumed at cruising speed.
Trip Distance
One-way trip distance in nautical miles.
Fuel Price
Current price per gallon of marine fuel.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Engine Horsepower = 150, Cruising Speed = 20, Fuel Burn Rate = 12, Trip Distance = 50 = 5 input(s) provided
  2. Calculate Fuel Needed
    Fuel Needed
    30 = 30
  3. Calculate Trip Time
    Trip Time
    2.5 = 2.5
  4. Calculate Fuel Cost
    Fuel Cost
    165 = $165

Engine last updated . Checked against 1 independently-derived test — how we verify calculators.

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Marine & Boating

Boat Displacement Calculator

Estimate your boat's displacement, waterline area, and theoretical hull speed from hull dimensions and type.

Marine & Boating

Anchor Line (Rode) Calculator

Calculate the proper anchor line scope, chain length, and rope length based on water depth and conditions.

Recreational Boating

Boat Fuel Efficiency Calculator

GPH and range from engine specs and speed.

Marine & Boating

Tide Height Calculator

Estimate the current tide height using the Rule of Twelfths, plus time to next high and low tide.

More in Aviation, Marine & Transport.