Windsurf Fin Calculator
Calculate the optimal fin size for your windsurfing setup based on your gear, conditions, and riding style
Your Setup & Conditions
Recommended Fin Size
Based on your input, this fin size will provide the best balance of speed, control, and maneuverability.
Understanding Windsurf Fin Selection
Choosing the right windsurf fin is crucial for performance and enjoyment. The perfect fin balances several factors to match your equipment, conditions, and riding style. Our windsurf fin calculator uses industry-standard formulas refined over decades by professionals worldwide.
How Factors Affect Your Fin Size
Rider Weight
Heavier riders need larger fins for stability and power. A 90kg rider typically uses fins 4-6cm larger than a 60kg rider with the same sail size.
Sail Size
Larger sails generate more power and require larger fins to maintain control. Each additional square meter generally requires 2-3cm more fin length.
Board Type
Wave boards use smaller fins for maneuverability, while slalom boards need larger fins for high-speed stability. Freeride boards fall in between.
Wind Speed
Stronger winds (25+ knots) require smaller fins to prevent overpowering, while lighter winds (10-15 knots) need larger fins to generate power.
Experience Level
Beginners benefit from slightly larger fins for stability, while experts can optimize for specific conditions with smaller or specialized fins.
Water Conditions
Choppy water benefits from slightly larger fins for control. Flat water allows for more precise fin tuning. Wave sailing requires smaller, more maneuverable fins.