BMI Calculator
Calculate your Body Mass Index (BMI) to assess if your weight is in a healthy range. Uses the WHO standard formula.
Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a screening tool that uses your height and weight to estimate body fat. It was developed by Adolphe Quetelet in the 1830s and is used by the WHO and CDC as a quick health assessment. The formula is: BMI = weight (kg) / height (m)².
What is a healthy BMI range?
According to the WHO, a healthy BMI is between 18.5 and 24.9. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is classified as obese. However, BMI does not account for muscle mass, bone density, age, or sex.
Is BMI accurate for athletes?
BMI can be misleading for athletes and muscular individuals because muscle weighs more than fat. A bodybuilder might have a "obese" BMI while having very low body fat. For a more accurate assessment, consider using a body fat calculator or DEXA scan.
Does BMI differ for different ethnicities?
Yes. Research shows that health risks associated with BMI vary by ethnicity. For example, the WHO suggests that Asians face higher health risks at lower BMI levels, with an overweight threshold of 23 (vs 25 for other populations).