How much bacteriostatic water do you add to a 5000 IU HCG (Human Chorionic Gonadotropin) vial?

A common choice is 1 mL, giving a concentration of 5000 IU/mL. The exact volume is up to you — more water makes a more dilute, easier-to-measure solution. Use the calculator above to match your target dose to a clean syringe mark.

How many units of HCG (Human Chorionic Gonadotropin) do I draw for a 250 IU dose?

With a 5000 IU vial in 1 mL of BAC water, a 250 IU dose is 5 units on a U-100 insulin syringe.

Reproductive / hormonal

HCG (Human Chorionic Gonadotropin) reconstitution calculator

Also known as Human Chorionic Gonadotropin, Pregnyl, Novarel

Reconstitute HCG (Human Chorionic Gonadotropin) by adding bacteriostatic water to the vial, then draw your dose on a U-100 insulin syringe. The calculator is pre-filled with commonly-referenced vial sizes (5000, 10000 IU) and water volumes (1, 2, 3, 5 mL) — every field is yours to override. Dosed in international units (IU), not mg — the vial strength and dose below are both in IU. TRT-maintenance doses (~250–500 IU) are far below IVF trigger doses.

New to this? How to use the calculator

1Enter what's on your vial. Type the peptide amount (mg) printed on the vial and the mL of bacteriostatic water you mixed in. Not sure how much water to add? Switch to the Solve: water tab and it tells you.
2Enter your dose — mind the unit. Type your target dose and pick mg or mcg with the toggle. This matters: 1 mg = 1000 mcg. GLP-1s (semaglutide, tirzepatide) are usually mg; most peptides (BPC-157, ipamorelin) are mcg.
3Read “Draw to … units”. The big number is how far to pull the plunger on a U-100 insulin syringe. Match it to the fill line on the syringe picture. The concentration and doses per vial are shown so a wrong answer looks wrong.

Three ways to use it

Solve: units — you know the dose; find how far to draw.
Solve: water — you want a round mark like 10 units; find how much water to add.
Solve: dose — you already drew some units; find the dose that was.

Full step-by-step guide

I have a vial, water and a dose — how many units do I draw?

Peptide in the vialIUThe amount printed on the vial label.BAC water addedmLBacteriostatic water you mixed in.

Target dose

Syringe size

U-100 insulin syringe — 1 mL holds 100 units.

Vial cost (optional)$Adds a cost per dose.

Draw to

5 units

Concentration: 5,000 IU/mL
Volume per dose: 0.05 mL
Doses per vial: 20

A U-100 syringe is marked in whole units. The nearest mark is 5 units, which delivers 250 IU.

Easier-to-read mixes

20 doses per vial either way

Different amounts of water put the same dose on a rounder mark. Tap one to use that water amount.

Want this dose scheduled, checked off daily and tracked by half-life?

Track it for free

This tool computes volumes only — it does not recommend doses. Any pre-filled values are commonly referenced examples to confirm with your provider. Always check the concentration and draw against your own vial and syringe.

HCG (Human Chorionic Gonadotropin) concentration quick-reference

Vial	BAC water	Concentration	Units for 250 IU
5000 IU	1 mL	5000 IU/mL	5 units
5000 IU	2 mL	2500 IU/mL	10 units
5000 IU	3 mL	1670 IU/mL	15 units
5000 IU	5 mL	1000 IU/mL	25 units
10000 IU	1 mL	10000 IU/mL	2.5 units
10000 IU	2 mL	5000 IU/mL	5 units
10000 IU	3 mL	3330 IU/mL	7.5 units
10000 IU	5 mL	2000 IU/mL	12.5 units

Example inputs for illustration. Confirm your actual dose with your provider.

HCG (Human Chorionic Gonadotropin) has a reported half-life of about 36 h. Track how much stays active between doses with a real pharmacokinetic burn-down.

Track HCG (Human Chorionic Gonadotropin) in PeptideBuddy

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