The body mass index (BMI) formula is dubbed by most doctors as the most reliable tool for calculating healthy weight. The BMI formula was invented by Adolphe Quelet and is a calculation to determine obesity. For most people, BMI offers a generally accurate picture of health; however, if you are extremely muscular, then BMI is not an accurate representation to use and another method should be employed, such as a waist-to-hip-ratio analysis.

- Skill level:
- Moderately Easy

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### Things you need

- Scale
- Pen and paper
- Tape measure
- Calculator

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## Instructions

- 1
Use a standard bathroom scale to weigh yourself in pounds.

- 2
Use a tape measure to determine your height in inches.

- 3
Multiply your weight in pounds by 703 with a calculator. Write this number down.

- 4
Multiply your height in inches by itself to determine its value squared. For example, if your height is 60 inches, then multiply 60 by 60.

- 5
Divide the total from the weight calculation by the total from the height calculation and write down this number.

- 6
Determine what the number means. If your number is below 18.5, you are underweight. If the number is between 18.5 and 24.9, you are normal. If the number is between 25 and 29.9, you are overweight. If the number is above 30, you are obese.