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BMI calculator
BMI shows whether your weight fits your height. Enter height and weight to see your index, WHO category and healthy weight range.
How BMI is calculated
Body mass index is weight in kilograms divided by height in meters squared. At 170 cm and 65 kg: 65 ÷ (1.7 × 1.7) = 22.5.
The World Health Organization groups adults like this: below 18.5 is underweight, 18.5-24.9 is healthy, 25-29.9 is overweight, and 30 or more is obesity.
What BMI misses
The index cannot tell muscle from fat. A muscular athlete can have a BMI above 25 with low body fat. Body fat percentage shows composition more accurately, and you can estimate it from measurements in the next calculator.
The adult scale does not apply to children, teenagers, pregnant women or older adults: they have their own norms.
Frequently asked questions
What is a healthy BMI?
For adults, 18.5 to 24.9. Within this range your weight is considered healthy for your height.
Is BMI the same for men and women?
Yes, the WHO adult scale is the same. Body composition differs: at the same BMI women usually carry more fat.
What if my BMI is above 25?
Check your body fat and waist. If the extra weight is fat, a moderate calorie deficit and strength training help.
Sources
- World Health Organization. A healthy lifestyle: WHO recommendations www.who.int/europe/news-room/fact-sheets/item/a-healthy-lifestyle---who-recommendations
In the app your calorie target updates by itself when your weight changes
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