Forestay length calculator

Mast step position calculator Vang calculator Forestay length calculator

These calculators are free to use, for guidance only and without responsibility.

Not sure how to use it? View the measurement guide here.
Forestay height above deck (mast collar)
From FH Measured along deck (@ mast collar)
Horizontal distance mast fwd face to forestay
Vertical distance between forestay pin and deck @mast
If FH is measured to intersection with mast. Or there is a toggle between mast-fitting and forestay.

Results

Type your data in the calculator - and see results here.

Need help? See the measurement guide.

Measurering guide pictures