Solving for your Body Mass Index (BMI) is straightforward. BMI is a simple calculation that estimates body fat based on your weight and height. It's a valuable screening tool, but doesn't directly measure body fat percentage or overall health.
Calculating Your BMI
There are two primary methods for calculating BMI, using either metric or US customary units:
Metric Units (kg and m)
- Measure your weight in kilograms (kg).
- Measure your height in meters (m).
- Square your height: Multiply your height in meters by itself (height x height).
- Divide your weight by your squared height: Weight (kg) / Height (m)² = BMI
Example: A person weighing 70kg and measuring 1.70m tall would calculate their BMI as follows:
- Height squared: 1.70m x 1.70m = 2.89 m²
- BMI: 70kg / 2.89 m² ≈ 24.2
US Customary Units (pounds and inches)
- Measure your weight in pounds (lbs).
- Measure your height in inches (in).
- Square your height: Multiply your height in inches by itself (height x height).
- Multiply your weight by 703: Weight (lbs) x 703.
- Divide the result by your squared height: (Weight (lbs) x 703) / Height (in)² = BMI
Example: A person weighing 154 lbs and measuring 67 inches tall would calculate their BMI as follows:
- Height squared: 67 in x 67 in = 4489 in²
- BMI: (154 lbs x 703) / 4489 in² ≈ 24.2
Online BMI Calculators
Many online calculators simplify this process. Several reputable sources provide these tools:
- National Heart, Lung, and Blood Institute (NHLBI): https://www.nhlbi.nih.gov/health/educational/lose_wt/BMI/bmicalc.htm
- Calculator Soup: https://www.calculatorsoup.com/calculators/health/bmi-calculator.php
- Cleveland Clinic: https://my.clevelandclinic.org/health/articles/9464-body-mass-index-bmi
- NHS (UK): https://www.nhs.uk/health-assessment-tools/calculate-your-body-mass-index/calculate-bmi-for-adults
- CDC (US): https://www.cdc.gov/bmi/adult-calculator/index.html
These calculators often handle unit conversions, making the calculation even easier. Remember, BMI is just one factor in assessing health; consult a healthcare professional for personalized advice.
