BMI & Body Composition Calculator

BMI plus a real body-fat estimate, not just a number.

BMI & Body Composition Calculator computes standard Body Mass Index from weight and height in either metric (kg/cm) or imperial (lb/in) units, color-codes the result against the WHO's Underweight/Normal/Overweight/Obese thresholds, and optionally estimates body-fat percentage using the published US Navy circumference method — neck and waist for men, plus hip for women — with all measurements correctly converted to centimeters internally regardless of which unit system you entered them in.

→Standard BMI formula — weight(kg) divided by height(m) squared — with instant results as you type
→Color-coded WHO categories: Underweight, Normal, Overweight, and Obese
→Optional US Navy body-fat estimate from neck and waist (plus hip for the female formula)
→Correct unit conversion between metric (kg/cm) and imperial (lb/in) built in throughout
→Clear 'general estimate only, not a medical diagnosis' disclaimer shown with every result
→Watermarked by Cikal Studio Labs · Works on any device, no install required

WHO BMI CategoriesUS Navy Body-Fat %Metric / ImperialMale / Female Formulas

$6.99

One-time purchase · No subscription

⚡Opens instantly after payment — no install

🔒Secure PayPal checkout

♾️Your link, yours to keep — use it anytime

📱Works on phone and computer

🌍Available worldwide

📝 Related Article

BMI vs. Body Fat Percentage: What Actually Matters in 2026

BMI is a useful screening number, not a diagnosis. Here's what it actually measures, where it falls short, and how a tape-measure body-fat estimate fills the gap.

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