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Sail
Area
Calculator
Calculate total sail area for sloop, ketch, and cutter rigs including mainsail and headsail
Input Parameters
Rig Type
Sloop
Ketch
Cutter
I (Foretriangle Height) (ft)
J (Foretriangle Base) (ft)
P (Mainsail Luff) (ft)
E (Mainsail Foot) (ft)
Mizzen P (ketch only) (ft)
Calculate
Results
--
Mainsail Area
ft²
--
Foretriangle Area
ft²
--
Total Sail Area
ft²
--
SA/Disp Ratio
Reference
Mainsail Area = 0.5 × P × E Foretriangle Area = 0.5 × I × J SA/Disp Ratio > 16 = fast cruiser, > 20 = racer