Check your body mass index and healthy weight range instantly.
24.2
Your BMI
Healthy
Category
53.5–72.0
Healthy kg
Body Mass Index (BMI) is a simple screening measure that uses your height and weight to estimate whether you are underweight, at a healthy weight, overweight, or obese. It is the most widely used first-step health indicator recommended by the World Health Organization.
Our free BMI calculator works entirely in your browser — nothing you enter is stored or sent anywhere. Enter your height and weight and you will instantly see your BMI value, the category it falls in, and the healthy weight range for your height.
How to use the BMI Calculator
1Enter your height in centimetres.
2Enter your weight in kilograms.
3Your BMI and health category appear instantly below.
4Compare your weight against the healthy range shown for your height.
Frequently asked questions
What is a healthy BMI?+
A BMI between 18.5 and 24.9 is generally considered healthy for adults. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.
Is BMI accurate for everyone?+
BMI is a screening tool, not a diagnosis. It does not account for muscle mass, bone density, or body composition, so athletes may show a high BMI despite being fit.
How is BMI calculated?+
BMI = weight in kilograms divided by height in metres squared (kg/m²). For example, 70 kg at 1.75 m gives a BMI of 22.9.