Galen eCalcs - Calculator: Ideal Body Weight (Hamwi)

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Revision as of 20:05, 9 December 2019 by David.Burkhead (talk | contribs)
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HAMWI 2019.png


The Hamwi formula for ideal body weight is based on height, frame size, and sex. Hamwi's method indicates that the ideal weight for a medium frame 5-foot tall male is 106 lbs and a 5-foot tall female is 100 lbs. For each additional inch higher than 5 feet, males add 6 lbs and females add 5 lbs. Males and females with small frames subtract 10 percent from the calculations and those with large frames add 10 percent.

To calculate a patient's frame size, they must place the thumb and the index finger around the wrist. If the finger overlaps the thumb, the "Small Frame" entry should be used. If the index finger and the thumb touch, the patient has a "Medium Frame". If they do not touch, the patient has a "Large Frame".

Calculator Search/Filter Keywords

At the calculator level, eCalcs comes delivered with default keywords that can be leveraged in the "Search/Filter" field to enable Specialty or System driven calculator searching. The following calculator keywords are delivered by default for the Ideal Body Weight (Hamwi) calculator:


  • Critical Care
  • Endocrinology
  • Family Practice
  • Gastroenterology
  • Gerontology
  • Internal Medicine
  • Pediatrics
  • Pulmonology


  • Musculoskeletal

Calculator Configuration Options

Preference Name Valid Range Description
Publishing Checked / Unchecked When checked, the calculator will display for users on the front end.
When unchecked, the calculator WILL NOT display for users on the front end.
Orderable Item Override (BLANK) / G-IdlWgtH “(BLANK)” indicates that the global configuration options for Orderable Item will be used.
“G-IdlWgtH” indicates that the calculator specific value will be used and can display the specific calculator name in the chart output.

Calculator Inputs

Input Mapping Type Description
Sex Demographics Patient Sex
Height Vitals Patient Height in inches
Frame Size Manual Input Refers to the patient's frame size

Calculator Outputs

Output Mapping Type Description
Ideal Body Weight Result Patient’s ideal body weight in pounds


HAMWI Formula for Ideal Body Weight