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Block Coefficient Calculator

Analyze hull fullness and performance characteristics

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 Block Coefficient (Cb) measures how 'full' a hull is by comparing the underwater volume to a rectangular box of the same length, beam, and draft. It is a key indicator of a boat's potential performance and seakeeping characteristics.

Key Concepts:

Block Coefficient (Cb): A measure of the hull's fullness, indicating its displacement relative to its dimensions.
Hull Volume: The underwater volume of the hull, calculated from its displacement and water density.
Performance Trade-offs: A lower Cb suggests a more easily driven hull, while a higher Cb suggests greater carrying capacity.
Frequently Asked Questions

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