Body Mass Index (BMI) is a screening measure that relates your weight to your height. It doesn't diagnose health on its own, but it's the standard first check used worldwide to flag whether your weight is in a healthy range for your height.
Your BMI
24.22
kg/m²
Informational only — not medical advice. BMI is a screening tool with known limitations. Consult a doctor for health decisions.
BMI = weight (kg) ÷ height (m)2
WHO categories for adults: under 18.5 is Underweight, 18.5–24.9 is Normal weight, 25–29.9 is Overweight, and 30 or above is Obese. These cut-offs were set for adult populations and are a screening tool, not a diagnosis.
A person who is 170 cm tall and weighs 70 kg:
Your BMI is the headline number; the category tells you where it sits on the WHO scale. The healthy weight range shows the weights that would put you in the normal band at your height.
Limitations worth knowing: BMI doesn't distinguish muscle from fat, so athletes can read as "overweight" while being very fit. It also isn't calibrated for children, pregnant women, or the elderly. Treat it as a starting point for a conversation with a doctor, not a verdict.
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Content last reviewed on 2026-10-06.