What this tool solves
MCG and syringe units are not the same thing. The calculator uses vial amount and BAC water to find concentration, then converts the selected mcg dose into U-100 syringe marks.
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Peptide calculator tool
MCG to Units Calculator
Convert a selected mcg amount into U-100 syringe marks after entering vial strength and BAC water.
Math support only
This page is for calculator math and education. It does not diagnose, prescribe, or replace product-label or prescriber instructions.When to use it
Use it when you know the compound amount in the vial, the amount of BAC water added, and the target dose you need to convert into syringe marks.
Important limit
IU or unit wording can be confusing. On this site, IU mode is used as a U-100 syringe mark scale, not as a universal biological International Unit conversion.
Frequently asked questions
Is 1 IU always the same as 1 mcg?
No. On PeptiCalc, IU mode means the U-100 syringe mark scale. The mcg value per mark depends on the vial amount and BAC water.
Is this a prescription or protocol?
No. PeptiCalc is a measurement calculator. It helps translate vial strength, BAC water, and a selected dose into syringe marks, but it does not prescribe treatment.
Can I edit the preloaded values?
Yes. Every value that opens in the calculator is editable, including vial amount, BAC water, syringe size, and dose.
Why do syringe marks matter?
Most U-100 insulin syringes show 100 marks per mL. The calculator converts the liquid dose into the mark to pull to on that syringe scale.