Free U-100 syringe converter

Free MCG to Units Calculator: U-100 Converter

Enter vial amount, BAC water, and dose to convert mcg into mL and U-100 syringe marks. Simple peptide reconstitution math.

Free MCG to units calculator for BAC water, dose volume, and U-100 syringe mark math.

U-100 marksBAC water mathmL to draw

Convert MCG to syringe units

Math support only

This page is for calculator math and education. It does not diagnose, prescribe, or replace product-label or prescriber instructions.

Example calculation

MCG to units calculator example

Try these values

This example shows why mcg and syringe units are not interchangeable. The dose only becomes a syringe mark after vial strength and BAC water are included.

Vial amount: 5 mg total
BAC water added: 2 mL
Example dose: 250 mcg
Concentration: 2,500 mcg/mL
Liquid to draw: 0.1 mL
U-100 syringe: 10th mark

In this example, the visual syringe guide would point to the 10th mark. Change the vial, water, or dose values in the calculator to match the exact instructions you are using.

PeptiCalc Pro

$5/mo

Saved snapshots, protocol notes, printable sheets, reminders, and advanced split tools for repeat calculator workflows.

Checking Pro status

What this tool solves

This MCG to units calculator makes the conversion easier: mcg and syringe units are not the same thing. It uses vial amount and BAC water to find concentration, then converts the selected mcg dose into U-100 syringe marks.

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.