BMI calculator

Enter weight and height to calculate BMI, see the World Health Organization category and the weight range considered healthy for that height.

lb
in

Adult categories (WHO).

BMI
25.4
Overweight
Underweight< 18.5
Healthy weight18.5 – 24.9
Overweight25 – 29.9
Obesity class I30 – 34.9
Obesity class II35 – 39.9
Obesity class III≥ 40
Healthy weight range
BMI between 18.5 and 24.9 at this height
125 – 169 lb

How it works

  1. BMI = weight (kg) ÷ height² (m). On this page you can enter pounds and inches — we convert for you.
  2. The category follows the WHO adult ranges: under 18.5, 18.5 to 24.9, 25 to 29.9 and obesity from 30.
  3. The healthy weight range is the weight that would put BMI between 18.5 and 24.9 at the same height.

FAQ

Does BMI show whether someone is overweight?

It's a screening tool, not a diagnosis. It doesn't tell muscle from fat: a muscular client can have a high BMI with little body fat. For body composition, use a skinfold protocol.

Does it work for children and teens?

Not with these ranges. Under 18, BMI is assessed with percentile charts by age and sex.

In Trainer Fácil, clients fill in weight and measurements in the app and you track progress assessment after assessment.

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