BMI Calculator
Calculate your Body Mass Index to understand your weight category. Enter your height and weight for instant results.
Your BMI
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What is BMI and how is it calculated?
Body Mass Index (BMI) is a simple measurement that uses your height and weight to estimate whether you're at a healthy weight. The formula divides your weight by the square of your height. For imperial units: BMI = (weight in pounds × 703) ÷ (height in inches)². For metric: BMI = weight in kg ÷ (height in meters)².
While BMI is a useful screening tool, it doesn't directly measure body fat. Athletes with high muscle mass may have a high BMI without excess fat. Always consult a healthcare professional for a complete health assessment.
Frequently asked questions.
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered normal weight. This range is associated with the lowest health risks for most adults.
Is BMI accurate for athletes?
BMI may overestimate body fat in athletes and people with muscular builds. It doesn't distinguish between muscle and fat mass. Consider body fat percentage measurements for a more complete picture.
Does BMI apply to children?
Children and teens use age-and-sex-specific BMI percentiles rather than the standard adult categories. This calculator is designed for adults aged 20 and older.