UK Sailmakers is excited to announce the release of a new and improved IRC Calculator, making it easier than ever to determine time corrections between competitors on the racecourse. This tool is designed to help racers calculate how much time they owe or are owed by their competitors, allowing for smarter tactical decisions during a race and aiding pre-race strategy.
Key Features:
- Add an unlimited number of boats to compare corrected time differences.
- Save and print your results as a PDF for easy reference on the water.
- Quickly access accurate calculations for the IRC Time on Time (ToT) rating system.
Understanding IRC Ratings
IRC is a rating rule that assigns each boat a Time Correction Coefficient (TCC). This TCC is calculated based on the boat’s measured and rated data, ensuring fair and competitive racing between different boat types. The calculator uses the entered TCC for each competitor to generate corrected time differences over various race durations.

Why Use This IRC Calculator?
Understanding your time allowances can be a game-changer. Whether you’re trying to maintain a lead or catch up to the competition, the ability to quickly and accurately predict time differences ensures you know exactly what it will take to win. The calculator provides instant, accurate results to help you:
- Evaluate your race performance in real-time.
- Strategize onboard by understanding how much time you need to gain or hold on to.
- Plan sail selection with confidence, knowing how changes might affect your time correction.
Ready to Gain a Tactical Edge?
The new and improved IRC Calculator is free to use and available on the UK Sailmakers website. Bookmark the UK Sailmakers IRC Center and bring the power of accurate time correction calculations with you to your next regatta!
