Tools:
Boat Horsepower Estimator

  • Use this calculator to estimate the horspower required to power your skiff. See the article "How Much Power Do You Really Need?"
  • Use English Units (pounds, cubic feet), no commas, please!

Hull dry weight, in pounds:  
Fuel tank capacity, in gallons:
Fuel Density (in pounds/gallon): Gasoline is about 6.1 lbs/gallon
Approximate Motor Weight (in pounds): Just a guess, to start. Adjust using real data after you get close.
Secondary Propulsion Weight (in pounds): This could be a kicker motor or an electric trolling motor
Number of Batteries:
Avg. Battery Weight (in pounds): A typical battery is 50 lbs.
Number of passengers:
Avg. Passenger Weight (in pounds):
Livewell capacity (in gallons):
Water density (in pounds/gallon): Saltwater is approx. 8.5 lbs/gallon
Ground tackle weight (in pounds): Include anchors, chains, ropes, etc.
Fishing Tackle Weight (in pounds):
Electronics Weight (in pounds):
Miscellaneous Gear, Group #1 (in pounds): Notes on #1:
Miscellaneous Gear, Group #2 (in pounds) Notes on #2:
Miscellaneous Gear, Group #3 (in pounds) Notes on #3:
Total weight (in pounds)  
Hull deadrise (in degrees)
Desired Cruise Speed (in statute MPH) This calculation is only valid for planing speeds!
Estimated Horsepower: This calculation is only valid for planing speeds!