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Reconstitution Calculator

Vial size + BAC water volume → exact mcg per insulin-syringe tick. The math you need before you ever touch a vial.

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Inputs
mg
mL
mcg
Common starting points

Compound names shown for convenience. The calculator does nothing different per compound — it's pure unit math.

Result
Concentration
2500 mcg/mL
Per syringe unit
25.0 mcg / unit
Units for target dose
10.0 units
Volume per dose
0.100 mL
Total doses in vial
20 doses
Vial total content
5,000 mcg
Where to draw on a U100 syringe
0102030405060708090100

Draw to about 10.0 units (10.0% of the syringe).

What if I dosed differently?
How the math works

A vial labelled 5 mg contains 5,000 mcg of dry peptide. When you add bacteriostatic water, the powder dissolves and the total volume of liquid becomes the volume of water you added.

The concentration is total_mcg ÷ water_mL. A standard U-100 insulin syringe is graduated such that one tick ("unit") = 0.01 mL. So the mcg delivered per unit is concentration × 0.01.

To get any target dose: units = dose_mcg ÷ mcg_per_unit. That's it — the rest is rounding for what you can actually measure on a syringe.

This calculator does not constitute medical or dosing advice. It performs a unit conversion. The user decides what concentration to prepare and what dose, if any, to extract.

From the team behind this tool

Need BAC water and clean vials?

Roji Peptides ships research-grade peptide vials (≥99% Janoshik-verified purity) along with bacteriostatic water and insulin syringes — everything you'd otherwise have to source from three different vendors.

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