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BMI Calculator — Body Mass Index
Calculate your Body Mass Index (BMI) and what it means for your health. Based on WHO standards.
What is BMI and How Is It Calculated?
BMI (Body Mass Index) is a statistical measure using height and weight to classify body weight. Developed by the WHO as a population screening tool, not an individual medical diagnosis.
BMI does not distinguish between muscle and fat — athletes may be incorrectly classified as overweight.
Children and teens have separate BMI charts by age and sex.
Use BMI as a starting point only — not as a substitute for medical advice.
Frequently Asked Questions
What is a healthy BMI for women?
The healthy BMI range (18.5–24.9) applies to both men and women. However, women naturally carry more body fat, so body fat percentage is also worth tracking.
Is a high BMI always bad?
Not necessarily. Athletes with high muscle mass can have a BMI of 27-28 and excellent health. BMI is a screening tool, not a diagnosis.