Adjusted Body Weight Calculator
IBW and adjusted weight for dosing.
Enter your values
Results update instantly as you type — no submit needed.
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.
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.