BMI Calculator
Enter your height and weight to instantly calculate your BMI, ideal weight (BMI 22), and weight category based on WHO/JASSO standards.
Input
BMI is a general guide to body size. It does not account for body-fat percentage or muscle mass, so treat the result as a reference only.
cm
kg
Result
Your BMI
20.8
Weight category:Normal weight
Category
Normal weight
Ideal weight (BMI 22)
63.6 kg
vs. ideal weight
-3.6 kg (under)
Beauty weight (BMI 20)
57.8 kg
Model weight (BMI 18)
52.0 kg
BMI categories
| Category | BMI range |
|---|---|
| Underweight | Under 18.5 |
| Normal weight (you) | 18.5 – under 25.0 |
| Obese (class 1) | 25.0 – under 30.0 |
| Obese (class 2) | 30.0 – under 35.0 |
| Obese (class 3) | 35.0 – under 40.0 |
| Obese (class 4) | 40.0 and above |
How it works
- BMI (Body Mass Index) is a simple measure that uses your height and weight to estimate whether your weight is in a healthy range. It is calculated as weight in kilograms divided by the square of height in meters (kg/m²).
- This tool reports your weight category using widely used thresholds: underweight (below 18.5), normal (18.5–25), overweight (25–30), and obese (30 and above).
- The ideal weight shown is the weight that corresponds to a BMI of 22, which is associated with the statistically lowest risk of illness.
- BMI does not distinguish between muscle and fat, so athletes and very muscular people may get a high reading. Use the result as a general guide only.
- All calculations run in your browser; nothing you enter is sent anywhere.
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BMI Calculator