Iβm excited to introduce the new Chiron Running Calculator β designed to help you predict race times, calculate training paces, and optimise your performance. And best of all, itβs completely free!


Is this the best free running calculator on the planet? I think so β but Iβd love to hear your thoughts! If you run into any issues or have suggestions for improvements, just comment and let me know.
If you find it useful, feel free to share calculator.chironapp.com with your running friends!
Happy running!
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