BMI is only a general guide. It does not measure body fat, muscle, age or health conditions. It is not medical advice. Please talk to a doctor for health decisions.
How to Check Your BMI
BMI compares your weight with your height.
- Choose metric or feet, inches and pounds
- Enter your height and weight
- See your BMI, category and healthy weight range
- Choose the Asian scale if it suits you better
Everything happens inside your browser, so your document is never uploaded.
Why Use This Tool?
BMI is a quick way to see whether your weight is low, normal or high for your height. It is often used as a first check.
This tool also shows the healthy weight range for your height and how much to gain or lose to reach it.
Features
- BMI with category and a colour scale
- Metric and feet-inch-pound input
- World (WHO) and Asian adult scales
- Healthy weight range for your height
- Shows how much to gain or lose
- Works instantly, nothing is saved
Frequently Asked Questions
How is BMI calculated?
BMI = weight in kg divided by height in metres squared.
What is a normal BMI?
18.5 to 24.9 on the WHO scale. On the Asian scale it is 18.5 to 22.9.
Why an Asian scale?
Health risks in many Asian adults begin at a lower BMI, so lower limits are used (23 for overweight, 27.5 for obese).
Is BMI accurate for everyone?
No. It does not separate muscle from fat. Athletes, older people, pregnant women and children need other measures. For children, ask a doctor.
Is my data saved?
No. Everything is calculated in your browser.
Is it free?
Yes, completely free.
About This Tool
A simple BMI calculator for a quick general check.
It is not medical advice. Please talk to a doctor for health decisions.