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Ideal Body Weight (Devine) Calculator

IBW for medication dosing using the Devine formula.

Compute the ideal body weight (IBW) used for many medication dosing calculations, using the Devine formula: 50 kg (men) or 45.5 kg (women) plus 2.3 kg per inch over 5 ft.

Priya Venkatesan By Priya Venkatesan
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

cm

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Men: 50 + 2.3 × (height inches − 60). Women: 45.5 + 2.3 × (height inches − 60).

In depth

Compute the ideal body weight (IBW) used for many medication dosing calculations, using the Devine formula: 50 kg (men) or 45.5 kg (women) plus 2.3 kg per inch over 5 ft.