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BMI Calculator
Calculate your Body Mass Index (BMI) from height and weight. Shows your BMI score, health category (underweight, normal, overweight, obese), and the healthy weight range for your height. Supports both metric (kg/cm) and imperial (lbs/inches) units.
Updated June 2026
- 1Enter your height and weight
- 2Calculate
- 3View your BMI and category
How to use BMI Calculator
- 1
Enter your height and weight
Use metric or imperial units, whichever you prefer.
- 2
Calculate
Click 'Calculate' to compute your Body Mass Index.
- 3
View your BMI and category
See whether you fall into underweight, normal, overweight, or obese ranges.
Frequently asked questions
Everything you need to know about bmi calculator.
BMI = weight (kg) ÷ height² (m²). For imperial units, BMI = (weight (lbs) ÷ height² (inches²)) × 703.
Underweight: below 18.5. Normal weight: 18.5–24.9. Overweight: 25–29.9. Obese Class I: 30–34.9. Obese Class II: 35–39.9. Obese Class III: 40 and above.
BMI is a useful screening tool for population-level health trends but does not account for muscle mass, bone density, or fat distribution. Athletes often have high BMI despite being very healthy.
Yes. Toggle between kg/cm (metric) and lbs/inches (imperial) — the calculation adjusts automatically.
18.5 to 24.9 is considered the normal/healthy range for most adults according to WHO guidelines.
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