I need to calculate my body mass index. How do I do that? My waist is 28 inches. I weigh 120 pounds and I'm 5'7"

1 answer

To calculate your Body Mass Index (BMI), you can use the following formula:

\[ \text{BMI} = \frac{\text{weight in pounds} \times 703}{\text{height in inches}^2} \]

You mentioned your weight is 120 pounds and your height is 5 feet 7 inches. First, let's convert your height to inches:

  • 5 feet = 5 × 12 = 60 inches
  • 7 inches = 7 inches
  • Total height in inches = 60 + 7 = 67 inches

Now, you can plug in your weight and height into the BMI formula:

\[ \text{BMI} = \frac{120 \times 703}{67^2} \]

Calculating \(67^2\):

\[ 67^2 = 4489 \]

Now plug that back into the formula:

\[ \text{BMI} = \frac{120 \times 703}{4489} \approx \frac{84360}{4489} \approx 18.8 \]

So, your BMI is approximately 18.8.

This falls within the underweight category, according to the BMI scale:

  • Underweight: BMI less than 18.5
  • Normal weight: BMI 18.5–24.9
  • Overweight: BMI 25–29.9
  • Obese: BMI 30 or greater

If you have any more questions or need further information, feel free to ask!