Understanding Your BMI
Body Mass Index (BMI) is a simple numerical measure that compares your weight to your height. It is widely used by medical professionals worldwide to categorize individuals into weight groups that may correlate with certain health risks.
How is it calculated?
The standard mathematical formula for determining BMI is Weight divided by Height squared. When using Imperial units (pounds and inches), the formula involves multiplying the result by a conversion factor of 703.
Standard BMI Categories Table
Use the chart below as a quick reference to see where your calculated BMI falls according to standard guidelines.
| Health Category | BMI Range | Health Risk Indicator |
|---|---|---|
| Underweight | Less than 18.5 | May indicate malnourishment or other health issues. |
| Normal weight | 18.5 – 24.9 | Generally associated with the lowest health risks. |
| Overweight | 25.0 – 29.9 | Increased risk of developing weight-related conditions. |
| Obese | 30.0 or greater | High risk for serious conditions like heart disease. |
❓ Frequently Asked Questions
Is BMI fully accurate for everyone?
No. While BMI is a useful general screening tool, it does not distinguish between muscle mass and body fat. Athletes with high muscle mass may be classified as "Overweight" despite being very healthy.
Can I use this for children?
This standard BMI calculator is designed for adults aged 20 and older. Children and teenagers have different growth patterns, and their BMI must be compared against age and gender percentile charts.