BMI Calculator
Calculate your Body Mass Index and see your weight category.
kg
cm
How to Use
Enter your weight and height in either metric (kg, cm) or imperial (lb, in) units to calculate your Body Mass Index (BMI) and see which weight category it falls into — underweight, normal, overweight, or obese.
Formula
Metric: BMI = weight (kg) / height (m)² · Imperial: BMI = 703 × weight (lb) / height (in)²
Examples
Metric example
unitSystem: metric, weight: 70, height: 175
22.86 (Normal weight)
Imperial example
unitSystem: imperial, weight: 154, height: 69
22.74 (Normal weight)
Frequently Asked Questions
- How is BMI calculated?
- Metric: BMI = weight (kg) ÷ height (m)². Imperial: BMI = 703 × weight (lb) ÷ height (in)².
- Is BMI a perfect measure of health?
- No. BMI is a general screening estimate and does not account for muscle mass, bone density, or body composition. This calculator provides a general estimate, not medical advice — consult a healthcare professional for a full assessment.