Body measurements
General adult screening and circumference-based estimates.
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Health calculators
Explore conservative informational estimates for adult body size, energy needs, hydration and fitness.
Most useful tools
BMI calculatorEstimate BMI from height and weight.BMR calculatorEstimate resting daily energy expenditure.TDEE calculatorEstimate daily energy expenditure from activity.Calorie calculatorEstimate daily energy requirements.Ideal weight estimatorEstimate an adult reference-weight range from height.Body fat estimatorEstimate adult body fat percentage from circumference measurements.
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Energy and hydration
Resting energy, broad activity estimates and fluid baselines.
Fitness planning
Non-diagnostic pace and speed calculations.
About these tools
Every result is an estimate, not a diagnosis, treatment recommendation or substitute for professional medical advice. Each calculator identifies its formula, limitations and source; individual circumstances and measurement technique can materially change interpretation.
All tools in this category
BMI calculatorEstimate BMI from height and weight.BMR calculatorEstimate resting daily energy expenditure.TDEE calculatorEstimate daily energy expenditure from activity.Body fat estimatorEstimate adult body fat percentage from circumference measurements.Calorie calculatorEstimate daily energy requirements.Ideal weight estimatorEstimate an adult reference-weight range from height.Water intake estimatorEstimate a simple daily fluid baseline from body weight.