How to use it
Pick metric or imperial, then enter your weight and height. The BMI, its category and the healthy weight range for your height appear as you type.
The formula
BMI = weight in kg ÷ (height in metres)²
Example: 65 kg and 165 cm. 1.65 × 1.65 = 2.7225, and 65 ÷ 2.7225 = 23.9, which is in the normal range.
| BMI | WHO category for adults |
|---|---|
| Below 18.5 | Underweight |
| 18.5 to 24.9 | Normal weight |
| 25 to 29.9 | Overweight |
| 30 and above | Obese |
Common questions
Are the cut-offs different for Filipinos and other Asians?
The WHO has said that for many Asian populations, health risks start at a lower BMI. It suggests watching from 23 (a higher risk) and 27.5 (a high risk). Many doctors in the Philippines use these lower points.
Is BMI accurate for everyone?
No. BMI does not tell muscle from fat, so it can call an athlete overweight. It is not meant for children, teens or pregnant women. For children, doctors use BMI-for-age charts.
Is BMI a diagnosis?
No. It is a quick screening number. Talk to a doctor about what your weight means for your health.
Last checked: 2026-09-25