What is a healthy BMI?

Using WHO adult cut-offs: 18.5-24.9 is considered normal. For many Asian populations, 18.5-22.9 is used as the normal range.

BMI is a screening tool and does not distinguish fat from muscle. Waist-to-height ratio and body fat % add context.

Does this work for children?

No. Children require age- and sex-specific percentiles, which this adult calculator does not provide.

BMI Calculator

⚡ Instant 📏 Metric & US 🌍 WHO / 🌏 Asian 🧮 Body fat % & WHtR 🔥 BMR & TDEE

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Age (years, optional)

Sex (for body fat %, optional)

Waist circumference (cm, optional)

Understanding your BMI

BMI (Body Mass Index) = weight (kg) ÷ height (m)². It's a quick screen-not a diagnosis. Muscular people may read "high" despite low body fat, while some with "normal" BMI may still have central obesity.

Your BMI position on the scale above adjusts in real time.

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References: WHO, Asian BMI cut-offs.

BMI categories and healthy weight range explainer — Visual explainer: BMI categories & healthy weight range.

FAQs

What are Asian BMI cut-offs?

Under <18.5, Normal 18.5-22.9, Overweight 23-24.9, Obese ≥25. Choose "Asian" from the Cut-offs menu.

What is BMI Prime?

BMI Prime = BMI ÷ 25. Values <1.0 are below the global overweight threshold; >1.0 above.

What is WHtR?

Waist-to-height ratio (waist/height). Aim for <0.5; 0.50-0.59 increased risk; ≥0.60 high risk.

BMI Calculator

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Understanding your BMI

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Your results

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