Reefing Calculator

Determine when to reef based on wind speed, heel angle, and sail area reduction

Input Parameters

Results

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Reef Recommended
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Reefed Sail Area
ft²
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Area Reduction
%
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Est. New Heel
degrees

Reference

Reef 1: ~20% reduction at 18-22 knots / 20° heel Reef 2: ~35% reduction at 22-28 knots / 30° heel Reef 3: ~55% reduction at 28+ knots / storm conditions