BMI Calculator
Calculate your Body Mass Index to understand whether your weight is in a healthy range for your height.
Your weight in kilograms
Your height in centimeters
BMI is a general indicator and does not account for muscle mass, bone density, or body composition.
Frequently Asked Questions
What is BMI and how is it calculated?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It is calculated by dividing your weight in kilograms by the square of your height in meters. For imperial units, the formula is: (weight in lbs / height in inches²) × 703.
What do my BMI results mean?
BMI categories are: Underweight (below 18.5), Normal weight (18.5–24.9), Overweight (25–29.9), and Obese (30 or higher). These ranges apply to adults aged 20 and older and are the same for men and women.
Are BMI scores accurate for everyone?
No. BMI does not distinguish between muscle and fat, so athletes and muscular individuals may score high despite low body fat. It also does not account for age, gender, or ethnicity — all of which affect body composition. Use BMI as a general screening tool, not a diagnostic measure.
Should I rely on BMI for my health decisions?
BMI is one of many health screening tools. It does not measure body fat directly or account for overall health. For a more complete picture, consider waist circumference, blood pressure, blood sugar, and cholesterol levels alongside BMI. Consult a healthcare provider for personal advice.