Enter your gender and height into the calculator to determine your ideal body weight according to the Hamwi formula. This calculator is designed to provide an estimate of the ideal body weight for adults.

Hamwi Formula

The Hamwi formula is used to calculate the ideal body weight (IBW) for adults. It is based on the individual’s gender and height. The formula is as follows:

For males: IBW = 106 lb + 6 lb for each inch over 5 feet
For females: IBW = 100 lb + 5 lb for each inch over 5 feet

Variables:

  • IBW is the ideal body weight in pounds (lb)
  • Height is measured in inches (in)

To calculate the ideal body weight using the Hamwi formula, select your gender, input your height in inches, and then use the appropriate formula based on your gender.

What is the Hamwi Formula?

The Hamwi formula is a simple method to estimate the ideal body weight of an adult. It was developed by Dr. G.J. Hamwi in 1964 and is still used today, particularly in the field of nutrition and dietetics. The formula takes into account the biological differences between males and females and provides a quick reference for healthcare professionals to assess body weight in relation to height.

How to Calculate Ideal Body Weight Using the Hamwi Formula?

The following steps outline how to calculate the ideal body weight using the Hamwi formula.

  1. Select your gender.
  2. Measure your height in inches.
  3. Use the appropriate formula based on your gender:
  4. For males: IBW = 106 lb + 6 lb for each inch over 5 feet.
  5. For females: IBW = 100 lb + 5 lb for each inch over 5 feet.
  6. Calculate your ideal body weight (IBW) in pounds.
  7. After inserting your height and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Gender: Male

Height: 70 inches (5 feet 10 inches)

According to the Hamwi formula, the ideal body weight for a male who is 70 inches tall is:

IBW = 106 lb + 6 lb for each inch over 5 feet

IBW = 106 lb + 6 lb * (70 in – 60 in)

IBW = 106 lb + 60 lb

IBW = 166 lb