What is BMI?
BMI (Body Mass Index) is a simple number calculated from your height and weight. It gives a rough idea of whether you are underweight, normal weight, overweight, or obese.
The Formula
BMI is calculated as:
BMI = Weight (kg) ÷ Height (m)²
For example, a person who is 70 kg and 1.75 m tall has a BMI of:
70 ÷ (1.75 × 1.75) = 22.9 — which falls in the Normal range.
BMI Categories
| Category | BMI Range |
|---|---|
| Underweight | Below 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25 – 29.9 |
| Obese | 30 and above |
Limitations of BMI
BMI does not account for muscle mass, bone density, or fat distribution. A bodybuilder may show as "obese" on BMI while being perfectly healthy.
Use PanaKit's BMI Calculator
You can calculate your BMI instantly using our free tool — no sign-up required.