How to Calculate Bmi
What is Bmi?
BMI (Body Mass Index) estimates body fat from weight and height. It screens for weight categories but cannot diagnose individual health — muscle mass, bone density, and body composition are not accounted for.
Step-by-Step Guide
- 1Metric: BMI = weight(kg) ÷ height(m)²
- 2Imperial: BMI = 703 × weight(lb) ÷ height(in)²
- 3Compare result to WHO categories
- 4Consult a healthcare professional for full assessment
Worked Examples
Input
70 kg, 1.75 m
Result
BMI 22.9
Normal weight
Input
180 lb, 5'9"
Result
BMI 26.6
Overweight