BMI Calculator
Calculate your Body Mass Index
Calculator
BMI Scale
BMI Categories
BMI is a general indicator and may not be accurate for athletes, elderly, or pregnant individuals. Consult a healthcare professional for personalized advice.
How to Use
Calculate your Body Mass Index in 3 simple steps
Enter your weight
Input your weight in kilograms (kg) or pounds (lb)
Enter your height
Input your height in centimeters (cm) or feet/inches
View your results
See your BMI value and what category it falls into
BMI Formula
BMI = weight (kg) / height² (m²)
Your weight in kilograms divided by your height in meters squared gives your BMI value.
Frequently Asked Questions
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 your height in meters squared (kg/m²). For example, a person weighing 70kg and 1.75m tall has a BMI of 22.9.
A healthy BMI is between 18.5 and 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is obese. However, BMI doesn't account for muscle mass, age, or body composition.
BMI may not be accurate for athletes or muscular individuals because muscle weighs more than fat. A bodybuilder might have a high BMI but low body fat. For athletes, body fat percentage is a better measure.
Checking your BMI once a month is sufficient for most people. If you're actively trying to lose or gain weight, you might check weekly, but remember that weight naturally fluctuates day-to-day.