Free Fitness Calculators

30+ science-based calculators for runners, cyclists, and triathletes. Calculate pace, heart rate zones, FTP, VO2 max, and more.

30+
Free Tools
5M+
Calculations
100%
Free Forever
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Running Calculators

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Heart Rate Calculators

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Cycling Calculators

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Performance & Fitness

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Interactive Tools & Timers

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