Adjusted Body Weight Calculator
IBW and adjusted weight for dosing.
Enter your values
ⓘ Live results
Results
- Adjusted body weight
- 87.8 kg
- Ideal body weight
- 73 kg
- Actual body weight
- 110 kg
- Percent over IBW
- 50.68%
- Lean estimate
- 87.8 kg
Quick answer
Adjusted body weight is ideal body weight plus 40% of the excess over ideal, used when actual weight overestimates dose.
AdjBW = IBW + 0.4 × (ABW − IBW)
How to use the Adjusted Body Weight Calculator
- 1Enter height in inches.
- 2Select sex for the Devine formula.
- 3Enter actual body weight in kilograms.
Worked example
Using the values the calculator loads with:
Inputs
- Height70 inches
- SexMale
- Actual weight110 kg
Results
- Adjusted body weight87.8 kg
- Ideal body weight73 kg
- Actual body weight110 kg
- Percent over IBW50.68%
- Lean estimate87.8 kg
Frequently asked questions
When is adjusted weight used?
For aminoglycosides and some chemotherapy dosing in obesity.
Which formula is this?
Devine ideal body weight with the standard 0.4 correction factor.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.