Enter your height and weight above to instantly calculate your Body Mass Index (BMI) and see which weight category it falls into — no signup, no upload, nothing leaves your browser.
Why Use a BMI Calculator?
- Quick health screening. BMI is one of the fastest ways to get a general sense of whether your weight falls in a typical range for your height.
- Tracking progress. Useful for monitoring changes over time alongside other health habits.
- Talking to a doctor. Having your BMI on hand can be a helpful starting point for a broader conversation about your health.
- Setting realistic goals. The healthy weight range shown gives you a concrete target based on your actual height.
How It Works
BMI is calculated by dividing your weight by the square of your height (kg/m²). Everything runs directly in your browser as you type — nothing is uploaded, stored, or sent to a server.
Quick Answers
- Under 18.5 is classified as underweight.
- 18.5 to 24.9 is classified as normal weight.
- 25 to 29.9 is classified as overweight.
- 30 and above is classified as obese.
Frequently Asked Questions
Is BMI an accurate measure of health?
BMI is a useful general screening tool, but it does not distinguish between muscle and fat, so athletes or very muscular individuals can show a higher BMI without excess body fat. It is best used as a starting point, not a complete health assessment.
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is generally considered a healthy range for most adults.
Does BMI apply the same way to children?
No. Children and teens are measured using age- and sex-specific BMI percentiles rather than the fixed adult categories used in this calculator.
How is the healthy weight range calculated?
It is calculated by applying the normal BMI range (18.5 to 24.9) to your specific height, giving you a weight range in kilograms or pounds rather than just a single BMI number.
Is this BMI calculator free to use?
Yes, it is completely free with no signup required. It runs entirely in your browser, so nothing you enter is stored or sent anywhere.
