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Calculate your Body Mass Index (BMI) to determine your ideal weight range.
The Body Mass Index (BMI) is a simple and widely used mathematical formula to estimate body fat based on your weight and height. It serves as an inexpensive and easy-to-perform screening tool for health professionals to identify potential weight problems in adults that may lead to health risks.
The BMI formula is the same for men and women:
Our free online BMI Calculator handles both metric and imperial measurements, instantly placing you into the correct weight category defined by the World Health Organization (WHO).
Is BMI accurate for everyone?
No. Because BMI only uses total weight, it cannot distinguish between fat and muscle. Therefore, highly muscular athletes may have an "Obese" BMI despite having low body fat. It is also not accurate for pregnant women or the elderly.
Do men and women have different BMI charts?
No. The standard adult BMI chart used globally applies equally to both men and women over the age of 20.
Can I use this calculator for my child?
Children and teenagers (ages 2-19) require a specialized BMI-for-age percentile chart, as their body fat changes significantly as they grow. This specific calculator is designed for adults 20 and older.