Peptide Reconstitution Reference Chart

Pick a vial size and a target dose; each cell shows the BAC water to add and the resulting U-100 syringe draw. No math required.

Dose range
Draw style
Reconstitution reference: rows are vial sizes, columns are target doses. Each cell shows BAC water to add and the resulting U-100 syringe units.

BAC water to add draw on a U-100 syringe ⚠ Incompatible — draw exceeds a 1 mL syringe or dose exceeds vial

Tip: type your own vial size into the last row or your own dose into the last column to chart any combination, and tap any cell to open it in the full calculator.

Peptide reconstitution reference

How this chart works

Each cell answers one question: for a vial of this size and this target dose, how much bacteriostatic (BAC) water should you add, and how many units do you then draw on a U-100 insulin syringe? The chart tries a set of common BAC volumes and picks the one that gives the cleanest syringe reading. The underlying relationship is:

units to draw = (dose mg ÷ vial mg) × BAC water mL × 100

The ×100 converts milliliters to insulin-syringe units, since 1 unit = 0.01 mL on a U-100 syringe. Worked example: a 5 mg vial with a 1 mg dose, reconstituted with 2.5 mL of BAC water, gives (1 ÷ 5) × 2.5 × 100 = 50 units.

The two draw styles

Easier to read favors larger, well-spaced draws that land on round unit marks near the middle of the syringe, so the dose is simple to measure even if it means injecting a little more fluid. Smaller volume favors the least fluid per injection while still keeping the draw reasonably round. Both never recommend a draw over 100 units, because that cannot be pulled in one go on a 1 mL syringe.

Adding your own vial size or dose

The last row and the last column of the chart are blank fields. Type any vial mass in milligrams into the last row, or any dose into the last column, and the chart fills in across every intersecting cell using the same logic, so you can chart a vial size or dose that is not in the presets without leaving the page. Nothing you type is saved or transmitted.

Reading the syringe

Use a U-100 insulin syringe and read the dose in units, not milliliters: each unit mark equals 0.01 mL. A cell flagged with a warning needs a draw larger than a standard 1 mL syringe holds, so either add less BAC water or split the dose. Tap any cell to open it in the reconstitution calculator with the values pre-filled, where you can fine-tune and see a syringe diagram.

GLP-1 (mg) vs research (mcg) ranges

The GLP-1 (mg) range covers vials and doses in the milligram scale typical of GLP-1 peptides. The Research (mcg) range covers smaller microgram-scale doses, with the column headers shown in micrograms (1 mg = 1000 mcg). Switch ranges to swap which vial sizes and doses the chart uses.

Data handling and privacy

The chart computes entirely in your browser. Nothing you enter, including a custom vial size, is transmitted or stored.

Scope & safety

PepRecon is a research and education resource. This chart and reference material are provided for informational purposes and are not medical advice; they do not establish a dosing recommendation. Consult a qualified clinician before use.

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