Engine Power Calculator

Calculate optimal engine power for your boat

Quick Samples

Try these common configurations to get started

25ft Sport Fishing Boat

Planing hull, high speed

30ft Cruising Sailboat

Displacement hull, auxiliary power

35ft Trawler Yacht

Heavy displacement, long range

Hull Dimensions

Enter your boat's principal dimensions

Length Overall (ft)

Beam (ft)

Displacement (lbs)

Target Speed (knots)

Hull Type

Boat Type

Load Condition

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About This Tool

This calculator estimates the required horsepower for your boat using established marine formulas. It considers key factors like displacement, length, and hull type to provide a reliable power recommendation, ensuring safe and efficient operation.

Key Concepts:

Displacement: The total weight of the boat.

Hull Type: Dramatically affects power needs (Displacement vs. Planing).

Power-to-Weight Ratio: A key indicator of potential performance.

Reserve Power: A safety margin for adverse conditions.

Frequently Asked Questions

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Engine Power Calculator

25ft Sport Fishing Boat

30ft Cruising Sailboat

35ft Trawler Yacht

Key Concepts:

What's the difference between required and recommended power?

How accurate are these calculations?

Should I choose a diesel or gasoline engine?

What is a good power-to-weight ratio?

How does hull speed affect my power needs?