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HCG reconstitution calculator.
Reconstituting an HCG vial? HCG is measured in international units (IU), not mg, which trips a lot of people up. Enter the IU in the vial, the bacteriostatic water you add, and your target dose in IU. You get the exact IU/mL concentration, the volume to draw in mL, and the units on a U-100 syringe. No rounding, no account, and the full math is shown.
Units shown for a U-100 insulin syringe (1 mL = 100 units). No rounding · the full math is above.
How the math works
Three steps, no hand-waving.
Reconstitution is simple arithmetic. The only thing that matters is that it is exact, and that you can see every step.
Vial IU ÷ BAC water mL = IU/mL. A 5000 IU vial in 5 mL of water is 1000 IU/mL.
Target dose ÷ concentration = mL to draw. 500 IU ÷ 1000 IU/mL = 0.5000 mL.
Draw mL × 100 = units on a U-100 insulin syringe. 0.5000 mL = 50 units.
Background
What HCG reconstitution is
HCG (human chorionic gonadotropin) ships as a lyophilized powder measured in international units (IU) and is reconstituted with bacteriostatic water before a dose can be drawn. The math is the same as any peptide, just in IU instead of mg: concentration is the IU in the vial divided by the mL of water you add. A 5000 IU vial in 5 mL of water is 1000 IU/mL, so a 500 IU dose is 0.5 mL, or 50 units on a U-100 syringe. This calculator does that arithmetic exactly.
- Reconstitution built into the dose logger, not a separate tool
- 28-day BAC water expiry countdown per vial
- Doses remaining and refill warnings, all derived
- Local-first · no account, data stays on your device
FAQ
HCG reconstitution questions, answered.
How do you calculate an HCG dose?
Divide the IU in the vial by the mL of bacteriostatic water you add for the concentration in IU/mL. Then divide your target dose in IU by that concentration for the draw volume in mL. Multiply by 100 for units on a U-100 insulin syringe.
How much BAC water for a 5000 IU HCG vial?
There is no single correct amount. 5 mL gives 1000 IU/mL and easy round numbers; 2 mL gives 2500 IU/mL and a smaller draw. Enter the amount you plan to add and the calculator returns your exact IU/mL, draw volume, and units.
How many units is 500 IU of HCG?
It depends on the concentration. At 1000 IU/mL (a 5000 IU vial in 5 mL), 500 IU is 0.5000 mL, or 50 units on a U-100 syringe. Change any input above to see your own numbers.
Why is HCG measured in IU instead of mg?
HCG potency is standardized by biological activity and expressed in international units (IU), not by mass. That is why this calculator works in IU and IU/mL throughout, rather than mg like most peptide tools.
Is HCG a prescription drug?
Yes. Human chorionic gonadotropin is an FDA-approved prescription hormone with legitimate medical uses. This tool performs arithmetic only and does not recommend a use, dose, or source. Confirm anything you do with your clinician or pharmacist.
How should reconstituted HCG be stored?
Reconstituted HCG is typically refrigerated and used within a limited window; follow your product's guidance. Regimio tracks a per-vial expiry countdown so you are not guessing how many days are left.
Is this medical advice?
No. This calculator performs arithmetic on the values you enter. It does not recommend a dose, schedule, or source. Confirm anything you do with a qualified provider.
- 1Chorionic gonadotropin (HCG) overview. PubChem, US National Library of Medicine
- 2The Prohibited List. World Anti-Doping Agency
This tool performs reconstitution arithmetic only. It is not medical advice and does not recommend any compound, dose, schedule, or source. Always follow guidance from a qualified provider. See our medical disclaimer.