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📘 Step-by-step guide

How to Use BMI Calculator – Complete Guide

Enter your height and weight to see your Body Mass Index, your category and the healthy weight range for your height.

⏱ 2 min read🛠 Utility Tools🔒 Free · Works on your device
🚀 Open BMI Calculator

⚡ Quick answer

BMI compares your weight with your height.

Open BMI Calculator, follow the steps below, and you are done in a minute or two. No sign-in is needed.

📋 How to use BMI Calculator – step by step

  1. Choose metric or feet, inches and pounds
  2. Enter your height and weight
  3. See your BMI, category and healthy weight range
  4. Choose the Asian scale if it suits you better

💡 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 at a glance

  • 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

🎯 Helpful tips

  • Double-check the values you type, because the result is only as good as the input.
  • For important matters such as money, land or legal papers, confirm the result with an official source.
  • Use the Copy button to move the result into your notes or messages.

❓ 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.

Ready to try it?

BMI Calculator is free and your files stay on your device.

🚀 Open BMI Calculator