What is Body Mass Index (BMI)?
BMI is a simple mathematical formula used globally by health professionals to determine if you are at a healthy body weight.
The BMI Mathematics
The calculation is relatively straightforward:
Metric: Weight (kg) / [Height (m)]²
Imperial: 703 × Weight (lbs) / [Height (in)]²
Imperial: 703 × Weight (lbs) / [Height (in)]²
What Do The Numbers Mean?
According to the WHO, the brackets are:
- Underweight: < 18.5
- Healthy Weight: 18.5 - 24.9
- Overweight: 25.0 - 29.9
- Obesity: 30.0+
Calculate Your BMI Instantly
Enter your height and weight into our free calculator to get your instant medical bracket result.
Open BMI Calculator