Health & Body Calculators — BMI, Growth, Longevity

Free health and body calculators for BMI, baby growth percentiles, children's charts, body fat, and life expectancy. Instant, accurate results with no sign-up.

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  BMI Calculatorlive

  Body mass index with WHO category ranges, healthy weight range, and BMI prime for adults 18+.

  BMI 24.3 · healthy
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  BMI Chartlive

  Look up your BMI category by height and weight using a colour-coded reference chart in metric or imperial.

  170 cm · 70 kg · BMI 24.2
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  Body Fat Calculatorlive

  Estimate your body fat percentage with the US Navy method or BMI method, with category ranges for men and women.

  18.4% body fat · fitness range
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  Baby Growth Percentile Calculatorlive

  Calculate your baby's weight, length, and head circumference percentiles using WHO Child Growth Standards (0–24 months).

  62nd percentile · 6 months
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  Children's Height & Weight Percentile Calculatorlive

  Height, weight, and BMI percentiles for ages 2–18 using CDC Growth Charts.

  74th percentile · age 8
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  Life Expectancy Calculatorlive

  Statistical estimate of life expectancy based on age, sex, country, and lifestyle factors using WHO and population-level data.

  78.4 yrs · +3 vs baseline
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  Pregnancy Due Date Calculatorcoming soon

  Estimated due date and week-by-week milestones.
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  Daily Calorie Needs Calculatorcoming soon

  TDEE based on age, weight, height, and activity.
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  Heart Rate Zone Calculatorcoming soon

  Training zones from resting and max heart rate.