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Wetted Surface Area Calculator

Estimate the wetted surface area of a hull based on its dimensions

Quick Samples
Try these common configurations to get started

Racing Sailboat

Fine-lined racing hull

Cruising Sailboat

Balanced cruising hull

Motor Yacht

Full-bodied motor yacht

Hull Dimensions
Enter your boat's principal dimensions
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About This Tool
The Wetted Surface Area Calculator estimates the total surface area of the hull that is in contact with the water. This is a key factor in determining frictional resistance, which is a major component of a boat's drag.

Key Concepts:

Wetted Surface Area: The total area of the hull that is in contact with the water.
Frictional Resistance: The drag caused by the friction of water flowing over the hull's surface.
Wetted Surface to Displacement Ratio: A measure of a boat's efficiency, comparing its wetted surface area to its displacement.
Frequently Asked Questions

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