Fast fitness calculators
Clean design. Accurate formulas. Built for lifters.
Professional Fitness Tools
Built with scientifically-validated formulas and designed for accuracy
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Based on
Scientific Research
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Designed for
Fitness Professionals
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Always
Free to Use
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Top Calculators
Top Guides & Resources
TDEE Calculator Guide
Complete guide to understanding and calculating your total daily energy expenditure.
1RM Calculator Guide
Complete guide to understanding and using one-rep max calculations.
Strength Training Guide
Complete guide to building maximal force and power through systematic strength training.