BMI Calculator
Body Mass Index (BMI) is a simple measure using your height and weight to work out if your weight is healthy.
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About BMI
BMI is a screening tool, not a diagnostic measure. It doesn't account for muscle mass, bone density, or body composition. Athletes and muscular individuals may have a high BMI but low body fat. Consult a healthcare professional for a complete assessment.
How BMI Works
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is the same for both men and women and all adult age groups.
"BMI provides a reasonable estimate of body fatness for most people."
The Formula
Metric: BMI = weight (kg) ÷ height² (m²)
Imperial: BMI = (weight (lb) ÷ height² (in²)) × 703
Example: 70kg ÷ (1.75m × 1.75m) = 22.9 BMI
BMI Categories (Adults)
| Category | BMI Range |
|---|---|
| Underweight | < 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25 – 29.9 |
| Obese | ≥ 30 |
Note: BMI is not suitable for children, pregnant women, or athletes. It's a screening tool only.
About the BMI Calculator
Calculates Body Mass Index (BMI) from height and weight, then classifies the result into standard weight categories.
Use as a quick screening tool for weight status. BMI is widely used in fitness and clinical settings but does not measure body fat directly.
BMI = weight (kg) / [height (m)]²
A person weighing 70 kg and 175 cm tall has a BMI of about 22.9, which falls in the normal range.
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