Calculate total and per-day IV immunoglobulin grams from body weight and a prescribed g/kg regimen.
Result
How to use this tool
Use the dosing weight specified by the prescriber, in kg.
2 g/kg is a common immunomodulatory total; replacement doses are lower and repeated.
The total is divided evenly; the tool also converts each day into mL.
10% products are 100 mg/mL; adjust if the product differs.
Formula & worked example
A 70 kg patient on 2 g/kg total receives 140 g, split as 28 g per day over 5 days, which is 280 mL per day of a 10% (100 mg/mL) product.
Limitations — read this before you rely on it
Published regimen arithmetic only. Actual product, rate, renal and thrombotic risk assessment and monitoring are clinician-determined. This tool is for education only and is not medical advice. Talk to a clinician about any result that worries you, and never change treatment because of a calculator result.
Frequently asked questions
For immunomodulation, 2 g/kg total over 2-5 days is common; for antibody replacement, roughly 0.4-0.6 g/kg at intervals.
Splitting reduces infusion reactions and volume load, and large totals cannot be given in one sitting.
A 10% immunoglobulin solution contains 100 mg per mL, so grams x 10 gives mL.
Not always; prescribers may cap or adjust for obesity, so the dosing weight used here should be the prescribed one.
No. Rates are titrated by product labelling and patient tolerance, and are outside this calculator.