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Prismatic Coefficient Calculator

Calculate hull efficiency and performance characteristics using prismatic coefficient analysis

Quick Samples
Try these common configurations to get started

Racing Yacht

Fine-lined racing hull

Cruising Sailboat

Balanced cruising hull

Motor Yacht

Full-bodied motor yacht

Hull Dimensions
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lbs
ft
ft
ft
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About This Tool
The Prismatic Coefficient (Cp) measures how the hull's volume is distributed along its length, indicating efficiency and speed potential. Cp = Cb / Cm, where Cb is the block coefficient and Cm is the midship coefficient. Lower values indicate finer hulls suited for speed, while higher values suggest fuller hulls with better load capacity.

Key Concepts:

Prismatic Coefficient (Cp): A measure of the longitudinal distribution of the hull's volume.
Block Coefficient (Cb): The ratio of the underwater volume of the hull to the volume of a rectangular block with the same overall length, beam, and draft.
Midship Coefficient (Cm): The ratio of the midship section area to the area of a rectangle with the same beam and draft.
Frequently Asked Questions

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