🏋️ Fitness Tools
Pace, one-rep-max, body-fat and hydration calculators with published formulas. Estimates, not medical advice.
4 working tools in this category · 57,769 tools platform-wide
Popular Fitness Tools
Running Pace Calculator
Calculate running pace per km and mile, speed, and a projected marathon time.
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One Rep Max Calculator
Estimate your one-rep max with the Epley formula and get training loads at common percentages.
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Body Fat Calculator
Estimate body fat percentage with the US Navy circumference method from neck, waist, hip and height measurements.
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Water Intake Calculator
Estimate daily water intake from body weight and exercise time using the standard 35 ml/kg guideline.
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Fitness Tools — FAQs
Are these fitness tools free?
Yes, basic use is free and does not require an account.
Is my data private?
Browser-based tools process everything on your device. Any tool that needs a server or external service states that on its own page.
Authoritative resources
- MDN Web Docs — Mozilla's developer reference for web technologies.
- W3C Standards — The World Wide Web Consortium's web standards.