BMI and the NHS categories
The NHS uses BMI as a general guide: under 18.5 underweight, 18.5–24.9 healthy, 25–29.9 overweight, 30+ obese. It’s a screening tool and doesn’t account for muscle mass or ethnicity-specific thresholds.
Frequently asked questions
Does the NHS use BMI?
Yes, as a starting point alongside waist measurement and other factors. A very muscular build can read as a high BMI without excess fat.