BMI Calculator
Check your Body Mass Index
Enter your height and weight to calculate your BMI — a screening measure that categorises weight status, with a colour-coded healthy-range indicator.
Please enter valid height and weight.
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UnderHealthyOverObese
Healthy BMI range: 18.5 – 24.9
How it works
- Metric: BMI = weight (kg) divided by height (m) squared.
- Imperial: BMI = 703 x weight (lbs) divided by height (in) squared.
- Under 18.5 Underweight, 18.5–24.9 Healthy, 25–29.9 Overweight, 30+ Obese.
Frequently asked questions
Is BMI accurate for everyone?
BMI is a screening tool; athletes, older adults, and pregnant people should consult a clinician.
What is a healthy BMI?
18.5 to 24.9 is the standard healthy range for adults.
Does age affect BMI?
The formula is the same, but interpretation can vary with age and muscle mass.