Prismatic Coefficient (CP)

Compute CP from volume & midship area, from CB & CM, via offsets (Simpson), or estimate a target empirically.

Result

CP = —

Enter inputs to compute.
Report: Prismatic Coefficient (Direct)
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Provide CB & CM directly, or leave one/both blank and give enough geometry to derive them.
If blank, we can compute from ∇/(L·B·T).
If blank, we can compute from AM/(B·T).
If blank, compute via CM·B·T below.
Result

CP = —

Enter inputs to compute.
Report: Prismatic Coefficient (From CB & CM)
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Equal spacing along L.
0…N, choose the station closest to midship.
Result

∇ (Simpson) = — m³

AM (chosen) = — m²

CP = —

Enter areas & station details.
Report: Prismatic Coefficient (Offsets)
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Empirical Target

Froude number: —

Suggested target: CP ≈ — (range —)

Heuristic for early sizing—refine with geometry.
Report: Prismatic Coefficient (Empirical)
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Tip: Keep L choice consistent. CP should be between 0 & 1 for realistic hulls.