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Hull Speed Calculator

Calculate the theoretical hull speed of a displacement boat

Quick Samples
Try these common configurations to get started

25ft Cruiser

Common small cruiser LWL

35ft Sailboat

Typical mid-size sailboat LWL

45ft Trawler

Long-range trawler LWL

Hull Dimensions
Enter your boat's principal dimensions
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About This Tool
This calculator determines the theoretical maximum speed of a displacement hull, a crucial factor in boat design and performance analysis. Understanding hull speed helps in selecting the right engine and predicting fuel consumption.

Key Concepts:

Hull Speed: The speed at which a boat's bow and stern waves align.
Waterline Length (LWL): The primary factor determining hull speed.
S/L Ratio: A non-dimensional speed indicator.
Displacement Hull: A hull type that is limited by its hull speed.
Frequently Asked Questions

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