BMI Calculator
Enter your height and weight to instantly see your BMI (Body Mass Index) and the corresponding WHO health category. Supports both metric (kg/cm) and imperial (lb/ft+in) units.
Your BMI—
Category—
Healthy weight range—
BMI scale (WHO)
15
18.5
25
30
35
40
Underweight < 18.5 · Normal 18.5–24.9 · Overweight 25–29.9 · Obese ≥ 30
Features
Metric (kg/cm) and imperial (lb/in)
WHO health category
Visual BMI scale
Healthy weight range for your height
Instant real-time calculation
How to Use
1. Choose your unit system: metric or imperial.
2. Enter your height and weight.
3. Your BMI, health category, and healthy weight range appear in real time.
4. Optionally enter age and sex to estimate ideal body weight using the Devine formula.
5. The colour bar below shows which health range you fall into.
Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a simple ratio of your weight to your height squared. It's a rough screening indicator for whether someone is underweight, normal, overweight, or obese — but it doesn't measure body fat directly.
Is BMI accurate for everyone?
BMI is a general guideline, not a diagnosis. Athletes with high muscle mass may show as 'overweight' even though they're healthy. Always consult a healthcare professional for personal advice.