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Waterline Length Calculator

Determine optimal waterline dimensions and performance characteristics

Quick Samples
Try these common configurations to get started

Classic Cruiser (30ft)

Traditional cruising sailboat

Racing Yacht (40ft)

Performance racing sailboat

Motor Cruiser (25ft)

Planing motor cruiser

Hull Dimensions
Enter your boat's principal dimensions

feet

feet

knots

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About This Tool
The Waterline Length Calculator helps determine optimal waterline dimensions and analyzes performance characteristics. Understanding waterline length is crucial for predicting speed, efficiency, and handling.

Key Concepts:

Hull Speed: Maximum efficient speed (1.34 × √LWL)
Speed/Length: Performance efficiency ratio
L/B Ratio: Length to beam ratio for stability vs speed
LWL: Load waterline length (typically 80% of LOA)
Frequently Asked Questions

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