QuickBMI.com
Fast, Accurate Health Calculators
Expert articles and guides on body metrics, fitness, nutrition, and healthy living
BMI predicts body fat within about 5–10 percentage points. Where it is reliable, where it misclassifies people, and the free measurement that fixes its blind spot.
Home BIA scales run 3–8 percentage points off a DEXA scan. How they compare with hand-held devices, hospital machines and a $3 tape measure.
A practical comparison of the two most common body measurements — and when each one is the better predictor of disease risk.
Ideal weight formulas all give different numbers. Here's how to interpret them and find a weight that works for your body.
What the research actually says about deficits, plateaus, and what size cut you can sustain past month two.
DEXA, BIA, calipers, Bod Pod, US Navy method — accuracy, cost, and when each one is worth using.
Metabolic age is one of the most-quoted and least-understood numbers on smart scales. Here's what it really tells you.
Why BMI alone isn't enough to assess your health, and how body composition gives you a more complete picture.