About health conversions
Health calculators help you reason about body composition, daily energy needs and clinical reference ranges. Our BMI calculator works in both metric and imperial units and shows where your score sits relative to standard WHO categories. None of these tools collect or transmit your data — every calculation runs locally in your browser.
All health tools
Every converter and calculator in this hub, ready to launch.
When you'll reach for these
Practical scenarios where this hub shines.
Tracking fitness
Quick BMI snapshots while you log workouts.
Doctor visits
Translate weight and height between metric and imperial.
International nutrition
Convert calories and joules between food-label conventions.
Key formulas
- BMI (metric)
BMI = kg / m² - BMI (imperial)
BMI = 703 · lb / in²
Common mistakes
Treating BMI as a diagnosis
It's a screening proxy — body composition and waist circumference matter too.
Did you know?
A 'food calorie' is 1,000 calories
Nutrition labels use the kilocalorie, written with a capital C.
Frequently asked
Is BMI a reliable measure of health?
BMI is a screening tool that works for population averages. It does not account for muscle mass, bone density or fat distribution — athletes and very lean individuals can score outside 'normal' yet be perfectly healthy.
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