BMI Calculator
Body mass index from your height and weight.
Your BMI
0
Category–
How this is calculated
BMI = weight (kg) ÷ height (m)². It's the standard World Health Organization formula. BMI is a quick screening measure — it doesn't distinguish muscle from fat, and it isn't a diagnosis. Athletes, older adults, and pregnant women in particular can fall outside the general categories without that reflecting their actual health.
BMI categories (adults, WHO)
- Below 18.5
- Underweight
- 18.5 – 24.9
- Healthy weight
- 25.0 – 29.9
- Overweight
- 30.0 and above
- Obesity
If you have concerns about your weight or health, a doctor or registered dietitian can give guidance tailored to you — this tool is for a quick estimate only.