Health Logo. Ideal & Adjusted Body Weight

Ideal Weight Calculator

Enter your gender, height and weight then click calculate to find your estimated IBW and ABW.

Gender
Height
Weight


Ideal Body Weight (IBW)
The patient is
Adjusted body weight (ABW)

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Background Information

For simplicity sake, we use the following formulas, but there are a number of different formulas used to calculate ideal body weight.

  • MEN: IBW (kgs) = 22 x (height in meters)2
  • WOMEN: IBW (kgs) = 22 x (height in meters - 10cm)2

A person is considered obese if they weigh 30% above their ideal body weight.

The World Health Organization (WHO) recommends both men and women to keep their BMI between 18.5 to 25.

Adjusted body weight is used for drug dosing measurements.

Adjusted body weight = IBW + 0.4 * ( actual weight - IBW)

Conversion factors

  • 1 Pound = 0.4536 Kilogram
  • 1 Inch = 2.54 Centimeters

Additional Formulas

G. J. Hamwi's Formula from 1964

  • men: 48.0 kg + 2.7 kg per inch over 5 feet
  • women: 45.5 kg + 2.2 kg per inch over 5 feet

B. J. Devine's Formula from 1974

  • men: 50.0 kg + 2.3 kg per inch over 5 feet
  • women: 45.5 kg + 2.3 kg per inch over 5 feet

J. D. Robinson's Formula from 1983

  • men: 52 kg + 1.9 kg per inch over 5 feet
  • women: 49 kg + 1.7 kg per inch over 5 feet

D. R. Miller's Formula from 1983

  • men: 56.2 kg + 1.41 kg per inch over 5 feet
  • women: 53.1 kg + 1.36 kg per inch over 5 fee