BMI Calculator
Calculate your Body Mass Index and body fat percentage. Units: Metric, US or St/lb.
Maintain this healthy range with a balanced plate, good sleep and regular movement.
BMI and body fat % are screening tools only. Consult a health professional for personalised advice.
What is Body Mass Index?
Body mass index (BMI) is a simple measure of weight relative to height used to classify underweight, normal weight, overweight and obesity in adults.
How BMI is calculated
The formula is BMI = weight (kg) / height2 (m2). You can also use pounds and inches with the same calculator.
BMI categories
- Underweight: BMI below 18.5
- Normal weight: 18.5 to 24.9
- Overweight: 25 to 29.9
- Obese: 30 or higher
Limitations
BMI does not directly measure body fat and may misclassify muscular or elderly individuals. Consult a health professional for a full assessment.
Source: Wikipedia
Understanding Body Mass Index
Body Mass Index (BMI) estimates body fat by comparing your weight to your height. It uses a simple formula to categorize weight ranges.
BMI formula
BMI = weight / height^2 where weight is in kilograms and height in meters.
Why it matters
BMI is a quick screening tool for identifying potential weight problems but it does not directly measure body fat or account for muscle mass.