BMI Calculator

Calculate your Body Mass Index and see what category you fall into

Files never leave your deviceNo signup required

Height

feet

inches

Weight (lbs)

Frequently Asked Questions

What is BMI?▼

Body Mass Index (BMI) is a measure of body fat based on your weight relative to your height. It applies to adult men and women. BMI = weight (kg) / height (m)².

What are the BMI categories?▼

Underweight: BMI below 18.5. Normal weight: 18.5 to 24.9. Overweight: 25.0 to 29.9. Obese: 30.0 and above.

Is BMI accurate?▼

BMI is a useful screening tool but does not directly measure body fat. It may overestimate body fat in athletes and underestimate it in older adults. Consult a healthcare provider for a complete health assessment.

How to Use BMI Calculator

1Open the BMI Calculator tool above - it loads instantly in your browser.
2Enter your data or upload your file. Everything is processed locally on your device - nothing is uploaded to any server.
3Get your results instantly. Copy, download, or share - completely free with no signup required.

BMI Calculatoris part of BriskTool's collection of free online tools. All tools run entirely in your browser for maximum privacy and speed.