The Student Room Group

bmi

hoe accurate are nhs ?
Reply 1
It's a pretty simple formula. The NHS calculator will be just as valid as the others, though some round to two decimal points whereas the NHS rounds to one.
Reply 2
It's a reasonable guide.

Technically, you have rugby players who are classed as overweight because of their size and weight, when it's muscle and not fat. But the average person using BMI would know from their diet and lifestyle if they are genuinely in an unhealthy or healthy BMI range.

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