Body Mass Index is weight in kilograms divided by height in metres squared. It is a quick population-level signal for under- or over-weight, but it cannot tell muscle from fat.

What is a healthy BMI range?

For adults, 18.5–24.9 is considered the healthy range by the WHO. Below 18.5 is underweight; 25+ is overweight; 30+ is obese.

Should I rely on BMI alone?

No. BMI ignores body composition. An athlete with high muscle mass can register as overweight. Pair BMI with body fat percentage or waist circumference for a fuller picture.

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BMI Calculator

Calculate Body Mass Index from your weight and height in either metric (kg, cm) or imperial (lbs, ft/in). See the BMI category and a healthy weight range.

Weight (kg)

Height (cm)

22.9

Normal

Healthy weight for your height: 56.7 – 76.3 kg

How to use BMI Calculator

Pick metric or imperial units.
Enter your weight and height.
Your BMI, category, and a healthy weight range appear instantly.

How to use BMI Calculator

Frequently asked questions

What is BMI?

What is a healthy BMI range?

Should I rely on BMI alone?