Body Mass Index (BMI) formula

Here is BMI formula if you don’t want to use our Body Mass Index Calculator and calculate body mass index manually.

It is very simple:

• Imperial or English BMI formula:
  BMI = [weight_in_pounds / (height_in_inches * height_in_inches)] *703
  Example: weight = 145lbs, height = 6 ft 1 in (ie 73 inches) and BMI = [ 145 / (73 * 73) ] * 703 = 19.13
• Metric BMI formula:
  BMI = weight_in_kilograms / (height_in_meters * height_in_meters)
  Example: weight = 70kg, height = 1.80m and BMI = 70 / (1.8 * 1.8) = 21.6

Here is how you can do if you want to use this formula with simple calculator on your PC or on phone:

Check BMI charts (imperial or metric) into which category your Body Mass Index falls.