Health calculator
BMI Calculator
Calculate your Body Mass Index using your height and weight.
Enter your height and weight to calculate your BMI.
BMI is a general screening measure for adults. It does not diagnose health conditions and does not account for muscle mass, body composition or individual medical factors.
About this BMI calculator
This free BMI calculator helps you calculate your Body Mass Index from your height and weight. It can be useful as a quick general reference, but it should not replace professional medical advice.
How it works
BMI is calculated by dividing weight in kilograms by height in meters squared. The result is shown instantly in your browser.
Frequently asked questions
- What is BMI? ▾
- BMI (Body Mass Index) is a measure calculated from your height and weight. It is used as a simple screening tool to identify potential weight-related health issues.
- How is BMI calculated? ▾
- BMI is calculated by dividing your weight in kilograms by the square of your height in metres. For example: 70 kg ÷ (1.75 m × 1.75 m) = 22.9.
- What is a healthy BMI range? ▾
- A BMI between 18.5 and 24.9 is generally considered healthy for most adults. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.
- Is BMI an accurate measure of health? ▾
- BMI is a useful screening tool but has limitations. It does not account for muscle mass, bone density, age, sex or fat distribution. Always consult a healthcare professional for a full assessment.
- Is this BMI calculator free? ▾
- Yes, completely free. No sign-up, no download and no ads. Works entirely in your browser.