Rudder Sizing Calculator

Calculate rudder area from hull dimensions for proper directional control

Input Parameters

Results

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Rudder Area
ft²
--
Rudder Span
ft
--
Rudder Chord
ft
--
% of Lateral Area
%

Reference

Rudder Area = LWL × Draft × type_factor Spade: 8% lateral area, Skeg: 10%, Keel-attached: 12% Aspect Ratio 2-3 for performance, 1.5-2 for cruising