In-depth guide

BMI in UK primary-care conversations

UK public-health materials often cite BMI because it is simple to communicate. Pair calculator outputs with lifestyle context—sleep, diet quality, activity—and professional advice when weight affects health.

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Stone vs metric consistency

If you think in stone/pounds, convert carefully before squaring height in metres. Mixed-unit mistakes are a frequent source of wildly wrong BMI.

FAQ

Does this replace GP advice?
Never—especially if medications or conditions affect weight.
Children?
Use centile charts—not adult thresholds.
Does NHS charge affect BMI usefulness?
Cost-free screening vs clinical interpretation are different layers.

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