HGH reconstitution & dosing reference
How this calculator works
The calculator converts a vial's growth-hormone content and the bacteriostatic (BAC) water added into the volume to draw on an insulin syringe. The governing relationship is:
units to draw = (dose IU ÷ vial IU) × 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 36 IU vial reconstituted with 1 mL of BAC water gives 36 IU/mL; for a 2 IU dose you draw 2 ÷ 36 = 0.056 mL, i.e. 5.6 units.
Units & conversions
HGH is dosed in international units (IU), not micrograms or milligrams. For high-purity recombinant HGH the WHO reference standard is approximately 1 mg ≈ 3 IU, the fixed rate the on-page converter uses. Syringe volume relates to draw as 1 mL = 100 units, so 0.01 mL = 1 unit.
Bacteriostatic water volume for vials and cartridges
Reconstitution volume sets the concentration but not the total dose available. Standard vials and cartridges are typically reconstituted with 1–3 mL of BAC water. A larger BAC volume lowers concentration and increases the units drawn for the same dose, which can improve measurement precision on the syringe.
Storing reconstituted HGH
Once reconstituted, HGH is generally refrigerated and used within a defined stability window; light and repeated temperature cycling degrade it. See PepRecon's bacteriostatic water stability data for the measured findings.
Syringe selection and reading units
Use a U-100 insulin syringe and read the dose in units, not milliliters: each unit mark equals 0.01 mL. Choose a syringe whose capacity is close to your draw so the markings you use are well spaced.
Using the calculator for other peptides (HCG and similar)
Any compound dosed in IU against a known vial IU and BAC volume follows the same math, so the calculator applies to HCG and comparable preparations. For milligram-dosed peptides use the Peptide Reconstitution Calculator, and for multi-peptide vials use the Peptide Blend Calculator.
Data handling and privacy
Calculations run in your browser. Values are not transmitted or stored unless you explicitly generate a share link.
Scope & safety
PepRecon is a research and education resource. This calculator 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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