Adjusted Body Weight Calculator
Estimate adjusted body weight for people whose actual weight is well above ideal weight.
Quick answer: enter your details below and click Calculate Adjusted Weight — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Enter your actual weight in kilograms.
- Enter the ideal weight in kilograms.
- Click Calculate Adjusted Weight.
About this tool
Adjusted body weight sits part-way between ideal and actual weight and is often used in dosing estimates. This tool takes 40 percent of the gap between the two and adds it to the ideal weight. Enter both weights and the adjusted figure appears at once. This is an estimate for general use, not a dosing instruction — check with a clinician for any medical use.
Frequently asked questions
Why 40 percent?
The common convention takes 40 percent of the excess over ideal weight, giving a figure between ideal and actual.
What if actual weight is below ideal?
The formula still works, but adjusted weight is mainly meant for cases where actual weight is well above ideal.