Free Health & Fitness Calculators
Eight fast, accurate calculators for body composition, nutrition, and training. No account required, no data collected — just results.
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Body & Weight
BMI Calculator
Body Mass Index from height and weight
Body Fat Calculator
Body fat % using the US Navy method
Ideal Weight Calculator
Healthy weight range for your height
Nutrition
Calorie Calculator
Daily energy needs (TDEE) via Mifflin-St Jeor
Macro Calculator
Protein, carbs & fat targets for your goal
Water Intake Calculator
Daily hydration needs by weight & activity