BMI Calculator
Calculate your body mass index (BMI) from your weight and height.
- Body mass index22.9
Inputs used
- Weight70 kg
- Height175 cm
About this calculator
Body mass index divides your weight in kilograms by the square of your height in metres. The World Health Organization's ranges for adults are: under 18.5 underweight, 18.5–24.9 healthy weight, 25–29.9 overweight, and 30 or above obese.
BMI is a quick population-level screening measure, not a diagnosis. It does not distinguish muscle from fat and can mislead for athletes, older adults and some ethnic groups — talk to a healthcare professional about what your number means for you.
Quick reference
BMI by weight and height
Metric values; switch the calculator above to imperial to work in pounds, feet and inches.
| Weight | 150 cm | 160 cm | 170 cm | 180 cm | 190 cm |
|---|---|---|---|---|---|
| 50 kg | 22.2 | 19.5 | 17.3 | 15.4 | 13.9 |
| 55 kg | 24.4 | 21.5 | 19.0 | 17.0 | 15.2 |
| 60 kg | 26.7 | 23.4 | 20.8 | 18.5 | 16.6 |
| 65 kg | 28.9 | 25.4 | 22.5 | 20.1 | 18.0 |
| 70 kg | 31.1 | 27.3 | 24.2 | 21.6 | 19.4 |
| 75 kg | 33.3 | 29.3 | 26.0 | 23.1 | 20.8 |
| 80 kg | 35.6 | 31.2 | 27.7 | 24.7 | 22.2 |
| 85 kg | 37.8 | 33.2 | 29.4 | 26.2 | 23.5 |
| 90 kg | 40.0 | 35.2 | 31.1 | 27.8 | 24.9 |
| 95 kg | 42.2 | 37.1 | 32.9 | 29.3 | 26.3 |
| 100 kg | 44.4 | 39.1 | 34.6 | 30.9 | 27.7 |
| 110 kg | 48.9 | 43.0 | 38.1 | 34.0 | 30.5 |
Frequently asked questions
What is a healthy BMI?
For adults, the World Health Organization's ranges are: under 18.5 underweight, 18.5–24.9 healthy weight, 25–29.9 overweight, and 30 or above obese. These cutoffs apply regardless of sex.
Is BMI calculated differently for men and women?
No — the formula (weight in kilograms divided by height in metres squared) and the adult ranges are the same for everyone. That simplicity is also a limitation: women typically carry more body fat than men at the same BMI.
Why can BMI be misleading?
It measures weight, not composition. A muscular athlete can register as overweight while carrying little fat, and an older adult can fall in the healthy range while carrying too much. Some ethnic groups also face weight-related health risks at lower BMI cutoffs.
Does BMI work for children?
Not with adult cutoffs. Children and teens are assessed with age- and sex-specific BMI percentile charts, because a healthy BMI changes substantially as a child grows.
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Results are informational only — not financial, medical or legal advice.