BMI Calculator (Body Mass Index)
PopularCalculate Body Mass Index (BMI) using metric or imperial units with World Health Organization (WHO) weight categories and healthy ranges.
Understanding Your Results
< 18.5 = Underweight; 18.5–24.9 = Normal / Healthy weight; 25.0–29.9 = Overweight; ≥ 30.0 = Obese.
Practical Guidance & Next Steps
Use BMI as a general baseline screening index. For comprehensive fitness assessments, combine BMI with body fat percentage and waist-to-height ratio measurements.
What is this?
A standard Body Mass Index (BMI) assessment tool based on World Health Organization formulas comparing body weight to height.
How does it work?
Why use it?
Serves as a general screening tool to evaluate whether body weight is in a healthy proportion to height.
IMPORTANT: BMI is a population statistical index. It does NOT distinguish between muscle mass, bone density, and body fat. Athletes, bodybuilders, pregnant women, and the elderly may have skewed BMI classifications.