Free health and fitness calculators

General estimates for BMI, daily calories and a healthy weight range.

Tools · Health & Fitness Calculators

What you can do

These calculators give general estimates for adults using standard formulas. They are a starting point for understanding your numbers.

They do not diagnose anything and do not replace advice from a doctor or dietitian, who can consider your age, health, body composition and goals.

  • BMI and the adult category it falls into
  • Daily calorie needs for maintaining, losing or gaining weight
  • Ideal weight with four classic formulas
  • Metric and imperial units

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