QuickKitBMI categories for adults
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 to 24.9 | Healthy weight |
| 25 to 29.9 | Overweight |
| 30 and above | Obesity |
What BMI can and cannot tell you
BMI is a quick way to compare weight with height. It is useful for spotting general trends in a population, but it cannot tell muscle from fat. An athlete can have a high BMI and low body fat. This tool is for information only and is not medical advice.
Frequently asked questions
How is BMI calculated?
BMI is your weight in kilograms divided by your height in meters squared. In pounds and inches the formula is 703 x weight / height squared.
What are the BMI categories?
For adults, the WHO ranges are: under 18.5 underweight, 18.5 to 24.9 healthy weight, 25 to 29.9 overweight, and 30 or above obesity.
Is BMI accurate for everyone?
No. BMI is a simple screening number. It does not measure body fat, muscle, age, sex or fat distribution, and the adult categories do not apply to children. Talk to a doctor for personal health advice.
Is my data saved?
No. The calculation happens in your browser and nothing is sent anywhere.