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BMI calculator

Enter your weight and height. You get your BMI, the World Health Organization category for adults and the weight range that matches a BMI between 18.5 and 24.9 for your height.

WeightkgHeightcm

Your BMI24.2

WHO category (adults)Healthy weight range

Weight for a BMI of 18.5–24.953.5 kg – 72 kg

BMI is a population measure, not a diagnosis: it doesn't tell muscle from fat and doesn't apply to children, teenagers or during pregnancy. For personal advice, talk to your doctor.

The full guideHow many calories do you need a day? Official ranges explained

How BMI is calculated

BMI is your weight in kilograms divided by the square of your height in metres. At 70 kg and 1.70 m, that's 70 ÷ (1.70 × 1.70) = 24.2. In pounds and inches, the formula is the same once converted, which this calculator does for you.

The WHO adult categories

below 18.5: underweight
18.5 to 24.9: healthy weight range
25 to 29.9: overweight
30 and above: obesity

For some populations, including people of Asian descent, health bodies use lower cut-offs because health risks start at a lower BMI.

What BMI doesn't tell you

BMI is a screening measure used across populations. It doesn't separate muscle from fat, doesn't show where fat is stored, and doesn't apply to children and teenagers (who use age-specific charts) or during pregnancy. A very muscular person can have a high BMI and be healthy. Waist measurement, blood pressure and other checks give a fuller picture, and your doctor is the right person to interpret them.

About this calculator

This is general information, not medical advice. Nothing you type leaves your browser. The Binome360 app can keep your weight as a simple number over time, with no targets or judgement, if you choose to note it.

Frequently asked questions

Is BMI accurate?

It's a useful rough measure for adults across a population, but not a diagnosis. It can overestimate fat in muscular people and underestimate it in older adults who have lost muscle.

Does BMI work for children?

No. Children and teenagers use BMI-for-age percentiles, because healthy body composition changes as they grow. Ask your child's doctor.

What's a healthy weight for my height?

The calculator shows the weight range matching a BMI of 18.5 to 24.9 for your height. It's a population reference, not a personal target.

Put it into practice

Say it once. Binome360 keeps the record.

A sentence, a voice note or a receipt photo: the assistant prepares the record in the right space, you confirm. 7 days free.

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