Formula
PeptiCalc converts total mg to mcg, then divides by BAC water in mL to get mcg per mL.
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MG, mL, and mcg/mL math
Free Peptide Concentration Calculator
Calculate peptide concentration in mcg/mL after entering total vial amount and BAC water volume.
Free peptide concentration calculator for BAC water, dose volume, and U-100 syringe mark math.
U-100 marksBAC water mathmL to draw
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
Peptide concentration calculator example
This example shows a 10 mg vial mixed with 2 mL BAC water. The concentration is 5,000 mcg/mL before any dose volume is calculated.
- Vial amount
- 10 mg total
- BAC water added
- 2 mL
- Example dose
- 500 mcg
- Concentration
- 5,000 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.
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Why it matters
Concentration is the bridge between dose amount and liquid volume. It decides how many U-100 marks match the selected dose.
Check before drawing
Use the exact vial amount and diluent volume from the label, pharmacy, or prescriber instructions.
Frequently asked questions
What is the concentration of 10 mg in 2 mL?
Ten mg equals 10,000 mcg. Divided by 2 mL, the concentration is 5,000 mcg/mL.
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.