Adjusted Body Weight Calculator
Find your ideal body weight and adjusted body weight, figures often used in clinical dosing.
Body CompositionScience-backed formula
Enter your details
Fill in the fields, then calculate
Enter your height.
Enter your weight.
Awaiting Data
Enter your details and tap Calculate to see your results appear here.
0
ResultYour result appears here.
What it measures
Ideal body weight estimates a healthy target from height. Adjusted body weight blends that with your actual weight, which clinicians use to dose some medicines more accurately.
Your measurements become one clear number you can track over time.
This tool reports both, using the Devine formula.
How to use this calculator
- Enter your sex and height.
- Enter your actual weight.
- Tap Calculate for ideal and adjusted body weight.
The formula used
IBW (men) = 50 + 2.3 × (inches over 60)
IBW (women) = 45.5 + 2.3 × (inches over 60)
Adjusted = IBW + 0.4 × (actual − IBW)
IBW (women) = 45.5 + 2.3 × (inches over 60)
Adjusted = IBW + 0.4 × (actual − IBW)
- IBW
- Ideal body weight.
- actual
- Your current weight.
Understanding Your Results
Ideal body weight
Devine estimate
A healthy reference weight.
Adjusted body weight
Dosing figure
Used when actual exceeds ideal.
Above ideal
Actual > IBW
Adjusted weight applies.
Tips to Improve
- Use adjusted weight only as a clinical reference.
- Confirm dosing with a pharmacist or doctor.
- Pair with body fat for fuller context.
- Re-check after weight change.
Frequently Asked Questions
It helps dose certain drugs in people whose weight is well above their ideal.
No. It is a reference estimate; a clinician must apply it.
The Devine formula, the most common clinical standard.
Scientific References
- Devine, B. J. (1974). Gentamicin therapy. Drug Intelligence & Clinical Pharmacy, 8, 650–655.
- Pai, M. P., & Paloucek, F. P. (2000). The origin of the ideal body weight equations. Annals of Pharmacotherapy, 34(9), 1066–1069.