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BMI Calculator UK

Check your Body Mass Index instantly.

24.2
Healthy weight

Underweight: below 18.5

Healthy: 18.5 – 24.9

Overweight: 25 – 29.9

Obese: 30+

BMI is a simple screening tool. It doesn't account for muscle mass, bone density, or body composition. Athletes often have high BMIs despite being very fit. Use it as a rough guide, not a diagnosis.