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Mainsheet Loading Calculator

The formula for mainsheet loading is not as widely accepted as that for genoa sheet loads and should only be used as a rough guide for offshore boats from 30 ft to 60 ft (9 m to 18 m).

Traveler car adjuster load is generally considered to be .2 times car load.

(E) Foot length of main in feet

(P) Luff length of the main in feet

(V) Wind speed in knots

(X) Length from aft end of boom to mainsheet attachment in feet

Calculate

Mainsheet load in pounds:

(E) Foot length of main in feet

(P) Luff length of the main in feet

(V) Wind speed in knots

(X) Length from aft end of boom to mainsheet attachment in feet

Calculate

Mainsheet load in kilograms:

Reset

English

SLSheet load in pounds
SASail area in square feet
VWind speed in knots

Metric

SLSheet load in kilograms
SASail area in square meters
VWind speed in knots

Formulas are for typical cruising monohulls with fixed keel and Dacron® sails, sheets, and halyards. For all other types, please contact Harken for technical assistance in calculating loads.

Dacron is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.