1
Enter Your Height
Input your height in centimeters or feet/inches depending on your preference.
BMI Calculator
Calculate your Body Mass Index
Pro Tip
Remember that BMI doesn't account for muscle mass. Athletes and very muscular individuals may have a high BMI while being very healthy. Use BMI as a screening tool, not a definitive health measure.
How to Use the BMI Calculator
2
Enter Your Weight
Input your weight in kilograms or pounds to match your height unit selection.
3
View Your BMI Category
Get your BMI score and see which health category you fall into (underweight, normal, overweight, or obese).
Understanding Body Mass Index
Body Mass Index (BMI) is a simple screening tool that calculates the relationship between weight and height. It's calculated as weight (kg) divided by height (m) squared. BMI categories are: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (≥30).
While useful as a population health screening tool, BMI has limitations. It doesn't distinguish between muscle and fat, varies by age, sex, and ethnicity, and may not accurately reflect health status for athletic individuals or older adults.
Frequently Asked Questions
BMI categories: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (≥30). Your category indicates general health risk.
No, BMI is less accurate for athletes and muscular individuals since it doesn't distinguish between muscle and fat. Muscle weighs more than fat.
Consult with a healthcare provider about your individual health goals. BMI is a screening tool, not a diagnostic measure.