BMI Calculator

Enter your height and weight in metric or imperial units to get your BMI, your weight category and the healthy weight range for your height. BMI is a screening guide and not a medical diagnosis.

About this tool

Body Mass Index (BMI) compares your weight to your height and is a quick screening number used for adults. Enter your height and weight to see your BMI value, your category (underweight, normal, overweight or obese) and the weight range considered healthy for your height. BMI is only a guide and does not measure body fat or muscle.

How to use the BMI Calculator

1. Choose metric or imperial units.
2. Enter height and weight.
3. Click Calculate BMI.

Why use this tool?

It is 100% free, needs no signup, gives instant results and works on desktop, tablet and mobile. Your data is processed in your browser and is not stored on our servers.

Frequently asked questions

What is a normal BMI?

A BMI between 18.5 and 24.9 is considered normal weight for adults.

Is BMI accurate for athletes?

Not always, because muscle weighs more than fat. Ask a doctor for advice.

What is a healthy BMI?

For most adults a BMI between 18.5 and 24.9 is considered the normal range.

Is BMI accurate for athletes?

Not always. Muscle weighs more than fat, so athletes can have a high BMI without excess body fat. Talk to a doctor for personal advice.

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