Fitness & Body Composition Calculators
Free, accurate calculators for body fat, calories, macros, strength, and more. No signup required.
Body Composition
Measure and track your body fat, muscle mass, and overall composition
AI Body Fat Calculator
AI photo estimate (not a medical measurement)
Body Fat Calculator
Navy method tape measurements
Army Body Fat Calculator
Official ABCP tape test method
Body Fat Visual Guide
Compare with visual references
Body Fat Goal Calculator
Plan your target body fat %
Body Fat Chart
Visual body fat reference guide
BMI Calculator
Body Mass Index calculation
FFMI Calculator
Fat-Free Mass Index for muscle potential
Lean Body Mass Calculator
Calculate your fat-free weight
Ideal Weight Calculator
Find your optimal weight range
Body Composition Calculator
Full breakdown of fat vs muscle
Body Recomposition Calculator
Build muscle while losing fat
Ideal Body Measurements
Golden ratio proportions
Waist-to-Hip Ratio
Health risk indicator
Waist-to-Height Ratio
Central obesity indicator
Nutrition & Calories
Calculate your daily calories, macros, and nutritional needs
TDEE Calculator
Total Daily Energy Expenditure
BMR Calculator
Basal Metabolic Rate
Macro Calculator
Protein, carbs, and fat targets
Protein Calculator
Daily protein requirements
Calorie Deficit Calculator
Calculate for weight loss
Bulking Calculator
Calories for muscle gain
Cutting Calculator
Calories for fat loss
Strength & Performance
Calculate your one-rep max and strength standards
One Rep Max Calculator
Calculate your 1RM from any weight
Bench Press Max
Calculate your bench 1RM
Squat Max Calculator
Calculate your squat 1RM
Deadlift Max Calculator
Calculate your deadlift 1RM
Strength Level Calculator
Compare your lifts to standards
Muscle Gain Calculator
Natural muscle building potential
Planning & Goals
Plan your fitness journey with realistic timelines
Why Use Our Calculators?
Science-Backed Formulas
Calculators use published equations, with rules of thumb clearly labeled
Multiple Methods
Choose from different calculation methods to find what works for you
Activity-Adjusted
Calculations factor in your activity level for accurate results
Or Skip the Math
Use AI photo analysis for a body composition estimate
Ready to Track Your Body Composition?Accurate
Calculators give you a snapshot. PhysiqueAI's AI photo scans give you a body composition estimate you can track over time.
Free account • Full results with Premium