BMI Calculator — by BitTools
Calculate your Body Mass Index. 100% client-side. No data leaves your browser.
Enter height in centimetres and weight in kilograms.
Your BMI result will appear here...
How to use
- Enter your height (in cm) in the first box and weight (in kg) in the second box.
- Click Calculate BMI (or press Ctrl/Cmd + Enter).
- You can Copy or Download the results instantly.
About This BMI Calculator
This free client-side BMI calculator helps you estimate your Body Mass Index (BMI). It runs entirely in your browser—no data is uploaded to any server.
👉 Read More Online BMI calculator by BitTools.cc
What is BMI?
Body Mass Index (BMI) is a number calculated from a person's weight and height. It's a simple tool to broadly categorize weight status: underweight, normal weight, overweight, or obese.
How is BMI calculated?
BMI = weight (kg) ÷ (height (m) × height (m)). For example, if you weigh 65 kg and are 170 cm tall (1.70 m), your BMI = 65 / (1.7 * 1.7) = 22.49.
FAQs about BMI
🔹 Is BMI a diagnostic tool?
No — BMI is a screening tool, not a diagnostic measure. It doesn't take account of muscle mass, bone density, overall body composition, and racial and sex differences.
🔹 What are the BMI categories?
- Underweight: < 18.5
- Normal weight: 18.5–24.9
- Overweight: 25–29.9
- Obesity: ≥ 30