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Displacement Calculator

Calculate your boat's displacement and D/L ratio.

Quick Samples
Try these common configurations to get started

30ft Cruising Sailboat

25ft Planing Powerboat

40ft Heavy Trawler

Hull Dimensions
Enter your boat's principal dimensions

feet

feet

feet

0.35-0.60 is typical

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About This Tool
The Displacement Calculator is a naval architecture tool used to determine a boat's weight and key performance ratios. By providing the main dimensions and the hull's 'fullness' (Block Coefficient), it calculates the vessel's displacement in both pounds and tons, and its Displacement-to-Length (D/L) ratio, a critical indicator of a boat's design purpose and handling characteristics.

Key Concepts:

Displacement: The total weight of the boat, equal to the weight of water it displaces.
Block Coefficient (Cb): A measure of the hull's underwater shape fullness.
D/L Ratio: Compares displacement to length, indicating performance type.
Water Density: Salt water is denser than fresh water, providing more buoyancy.
Frequently Asked Questions

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