Body Mass Index (BMI) Calculator
Calculate your BMI to assess if you're at a healthy weight for your height.
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Table of Contents
BMI Formula
Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women.
How to Calculate BMI
To calculate your BMI, follow these steps:
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1Measure your weight in kilograms
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2Measure your height in meters
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3Square your height (multiply it by itself)
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4Divide your weight by your height squared
For example, if you weigh 70 kg and are 1.75 meters tall:
BMI Categories
BMI categories are used to classify weight status and potential health risks:
Underweight
BMI less than 18.5
May indicate malnutrition or other health issues.
Normal weight
BMI 18.5 to 24.9
Generally associated with the lowest health risks.
Overweight
BMI 25 to 29.9
May increase risk of health problems.
Obese
BMI 30 or higher
Associated with increased health risks.
BMI Limitations
While BMI is a useful screening tool, it has some limitations:
- Does not account for muscle mass, bone density, or body composition
- May not be accurate for athletes, pregnant women, or the elderly
- Does not consider factors like age, sex, or ethnicity
- Should be used as part of a comprehensive health assessment