BMI Calculator
Calculate your Body Mass Index (BMI) with instant results. Understand what the number means and its limitations.
ft
in
lbs
Formula
BMI = 703 × weight(lb) / height(in)²
The 703 factor converts lbs/in² to kg/m².
23.63
Normal weight
BMI = 23.63
1018.5253040+
BMI Categories (WHO Standard)
Underweight
< 18.5
Normal weight
18.5 – 24.9You
Overweight
25 – 29.9
Obese Class I
30 – 34.9
Obese Class II
35 – 39.9
Obese Class III
≥ 40
BMI Calculator
Generated June 10, 2026Your BMI
23.63
Classification
Normal weight
Inputs
Height5 ft 9 in
Weight160 lbs
BMI Categories Reference
| Category | BMI Range | Your Status |
|---|---|---|
| Underweight | < 18.5 | |
| Normal weight | 18.5 – 24.9 | ← You are here |
| Overweight | 25 – 29.9 | |
| Obese Class I | 30 – 34.9 | |
| Obese Class II | 35 – 39.9 | |
| Obese Class III | ≥ 40 |
Why BMI Has Limitations
BMI does not distinguish between muscle and fat mass. Athletes and very muscular individuals often register as "overweight" or "obese" despite having low body fat.
BMI also does not account for age, sex, ethnicity, or fat distribution. Abdominal fat (waist circumference) is often a stronger predictor of metabolic risk. Use BMI as a rough screening tool only.