Sail Area / Displacement Ratio

Displacement / Water Line Length Ratio

14 and below is slow in light air

120 and below is performance plus

14 to 18 is below average

120 to 180 are performance cruisers

18 to 21 is above average

180 to 250 are moderate cruisers

21 and above will be fast in light air

250 to 300 are medium heavy cruisers

300 and above are slow in light air

Enter Your Specifications

Sail Area:


Water Line Length:

Formula SA/Disp Ratio=SA/((Disp/64)^2/3)

Formula Disp/WL Ratio=(Disp/2240)/((LWL * 0.01)cubed)

SA/Disp Ratio:

Disp/WL Ratio: