Professional Sailing Calculators & Tools
Navigate with confidence using our suite of accurate, easy-to-use sailing calculators
Essential Tools for Every Sailor
From passage planning to anchoring, we've got you covered
Sailing Distance & Time Calculator
Calculate nautical distances between ports and estimate sailing time based on boat speed
Tide Height Calculator (Rule of Twelves)
Calculate tide height at any time using the Rule of Twelves method
Anchor Scope Calculator
Calculate proper anchor rode length for safe anchoring in various conditions
True Wind Speed & Direction Calculator
Convert apparent wind to true wind accounting for boat speed and direction
Sail Area & Power Calculator
Calculate sail area requirements and sail area to displacement ratio
Hull Speed Calculator
Calculate theoretical hull speed and speed/length ratio for displacement hulls
Why Choose SailMentor?
Trusted by thousands of sailors worldwide for accurate calculations and comprehensive education
⚓ Built by Sailors
Every tool is designed with real-world sailing experience in mind, addressing the actual challenges you face on the water.
📚 Educational Content
Don't just get numbers – understand the theory, methods, and practical applications with our detailed guides.
🎯 Accurate & Reliable
Industry-standard formulas and methods ensure precise calculations you can trust for navigation and safety.
📱 Works Everywhere
Access all tools from any device – desktop, tablet, or mobile. Perfect for planning at home or quick calculations at sea.
Start Your Calculation
Choose the tool you need:
Trusted by Sailors Worldwide
Join thousands who rely on SailMentor for their sailing calculations
For Beginners
Learning to sail? Our tools help you understand the fundamentals with clear explanations and educational content.
For Cruisers
Planning passages? Calculate distances, tides, and anchoring requirements for safe and enjoyable cruising.
For Racers
Optimize performance with precise wind calculations, hull speed analysis, and sail area optimization.
Ready to Navigate with Confidence?
All tools are free to use, no registration required