BMI Calculator
Work out your Body Mass Index and see the healthy weight range for your height — in metric or imperial, using the NHS categories.
Not medical advice. This BMI calculator is for general information only and is not medical advice. Speak to your GP or a healthcare professional about your weight and health. Source: NHS.
Enter your height and weight
Your BMI, weight category and healthy weight range appear here as you type.
How BMI is calculated
BMI divides your weight in kilograms by the square of your height in metres (kg/m²). For most adults, a BMI of 18.5–24.9 is a healthy weight, 25–29.9 is overweight, and 30 or above is obese. It's a useful screening tool but doesn't measure body fat directly — very muscular people can have a high BMI while still being healthy, so treat it as a general guide and talk to your GP about your individual health.