Health & Fitness Calculators
Calculate common body-size, energy, fitness, and training measures. Results include plain-language formulas and limitations so you can compare the right metric for your goal.
Body, energy, and fitness tools
BMI Calculator
Calculate body mass index from height and weight with adult category context.
Open calculator →Body Fat Calculator
Estimate body-fat percentage with supported measurement methods and limitations.
Open calculator →BMR Calculator
Estimate basal metabolic rate, the energy used by the body at rest.
Open calculator →TDEE Calculator
Estimate total daily energy expenditure from BMR and activity level.
Open calculator →Lean Body Mass Calculator
Estimate fat-free mass using published adult equations.
Open calculator →Waist-to-Hip Ratio Calculator
Calculate waist divided by hip circumference in inches or centimeters.
Open calculator →VO₂ Max Calculator
Estimate maximal oxygen uptake and compare general fitness context.
Open calculator →Biological Age Calculator
Explore a general wellness estimate based on entered lifestyle and body measures.
Open calculator →No single metric tells the full story
BMI, body fat, waist-to-hip ratio, BMR, TDEE, and VO₂ max measure different things. Use the result that matches your question and avoid treating one estimate as a complete health assessment.
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