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Free BMI Calculator
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Enter your height and weight to get your Body Mass Index instantly, with your health category (underweight, healthy, overweight, obese) based on WHO standards. Works with metric (kg/cm) or imperial (lb/ft) units.
centimeters
kilograms
Healthy Weight by Height (WHO Standard)
Healthy BMI = 18.5 – 24.9. Find your height to see your ideal weight range.
| Height | Healthy weight | Underweight below | Overweight above |
|---|
BMI is a screening tool, not a medical diagnosis. Muscle mass, bone density, and body composition affect results. Consult a healthcare professional for personal advice.
How to Calculate Your BMI
- Step 1: Choose metric (kg/cm) or imperial (lb/ft) units.
- Step 2: Enter your height and weight.
- Step 3: See your BMI instantly with your WHO health category.
Why Use Our BMI Calculator?
- Instant results with visual category indicator
- Metric and imperial units supported
- WHO-standard categories explained
- Free, private, no signup
Frequently Asked Questions
What is a healthy BMI?
The WHO defines 18.5–24.9 as the healthy range for most adults. Below 18.5 is underweight, 25–29.9 overweight, 30+ obese.
Is BMI accurate for everyone?
BMI is a screening tool, not a diagnosis. Athletes with high muscle mass may show a high BMI while being very fit — consult a professional for personal advice.