BMI Calculator
Calculate Body Mass Index and see your result on a labeled health-zone scale
About this calculator
The BMI Calculator computes your Body Mass Index from your height and weight in either metric or imperial units. BMI is a widely used screening tool that places you in one of four categories: underweight, normal weight, overweight, or obese. Enter your measurements to see your BMI and category instantly.
How to use the BMI Calculator calculator
- Enter your values into the input fields.
- Read the result — it updates instantly as you type.
- Adjust the inputs to compare scenarios.
- Copy the page URL to share the exact calculation.
Common examples
- 70 kg, 175 cm → BMI = 22.9 (Normal weight)
- 90 kg, 170 cm → BMI = 31.1 (Obese)
- 55 kg, 165 cm → BMI = 20.2 (Normal weight)
- 200 lbs, 5 ft 10 in → BMI = 28.7 (Overweight)
- 130 lbs, 5 ft 4 in → BMI = 22.3 (Normal weight)
Frequently asked questions
How does the BMI Calculator calculator work?
Enter your numbers and the calculator applies the standard formula for this everyday task, showing the result and how it was reached. It handles the unit and rounding details so you do not have to.
When would I use the BMI Calculator calculator?
Whenever this comes up in daily life — planning, shopping, home projects, travel or work — and you want a quick, dependable answer instead of estimating or working it out by hand.
How accurate are the results?
The math runs at full precision internally and only the displayed value is rounded for readability. For real-world use the practical limit is the accuracy of the numbers you enter, not the calculation.
Can I share a specific calculation with someone else?
Yes. Every value you enter updates the URL, so copying the address bar and sharing the link reopens the exact same calculation for whoever clicks it.