You can calculate your Body Mass Index (BMI) using a simple formula involving your weight and height.
BMI Calculation Methods
There are two common ways to calculate BMI, depending on whether you use pounds and inches or kilograms and meters.
Method 1: Using Pounds and Inches
This method is commonly used in the United States. Here are the steps:
- Multiply your weight in pounds by 703.
- Divide that answer by your height in inches.
- Divide that answer by your height in inches again.
The formula is: BMI = (weight in pounds / (height in inches x height in inches)) x 703
Example:
Let's say you weigh 150 pounds and are 5'5" (65 inches) tall.
- 150 pounds x 703 = 105450
- 105450 / 65 inches = 1622.31
- 1622.31 / 65 inches = 24.96
Your BMI is approximately 24.96.
Method 2: Using Kilograms and Meters
This method is more common in countries that use the metric system.
- Measure your weight in kilograms.
- Measure your height in meters.
- Divide your weight in kilograms by your height in meters squared.
The formula is: BMI = weight in kilograms / (height in meters x height in meters)
Example:
Let's say you weigh 68 kilograms and are 1.7 meters tall.
BMI = 68 kg / (1.7 m x 1.7 m) = 68 / 2.89 = 23.53
Your BMI is approximately 23.53.
BMI Interpretation
Once you have calculated your BMI, you can interpret it using the following categories:
- Underweight: BMI less than 18.5
- Normal weight: BMI between 18.5 and 24.9
- Overweight: BMI between 25 and 29.9
- Obese: BMI of 30 or greater
Keep in mind that BMI is a screening tool and does not directly measure body fat. Factors such as age, sex, ethnicity, and muscle mass can influence the relationship between BMI and body fat. Consult with a healthcare professional for personalized advice. You can also use online BMI calculators for convenient calculations. Cleveland Clinic BMI Information provides further detail.
