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[TRT · hCG · 10,000 IU vial]

hCG 10,000 IU reconstitution: how much water and how many units

Water volume chart · Syringe units · Draws per vial

Short answer: 10 mL of bacteriostatic water in a 10,000 IU hCG vial makes 1,000 IU/mL. On a U-100 insulin syringe (1 mL = 100 units), every 10 units then holds 100 IU. More water gives a weaker solution and a bigger draw for the same amount; the amount in the vial stays 10,000 IU.

Water volume chart for a 10,000 IU vial

10,000 IU hCG vial, U-100 insulin syringe.
Water addedConcentrationPer 10 unitsPer 1 unit
1 mL10,000 IU/mL1,000 IU100 IU
2 mL5,000 IU/mL500 IU50 IU
5 mL2,000 IU/mL200 IU20 IU
10 mL1,000 IU/mL100 IU10 IU

Syringe units by amount

The amounts below are examples to show the conversion, not doses. How much to take is a decision for you and your prescriber.

Units on a U-100 syringe from a 10,000 IU vial.
Water added250 IU500 IU1,000 IU
1 mL2.5 units5 units10 units
2 mL5 units10 units20 units
5 mL12.5 units25 units50 units
10 mL25 units50 units100 units

A 10,000 IU vial holds 40 draws of 250 IU, 20 draws of 500 IU, 10 draws of 1,000 IU, no matter how much water you add.

The math

  1. Concentration. 10,000 IU ÷ 10 mL = 1,000 IU/mL
  2. Volume to draw. amount ÷ 1,000 IU/mL = mL
  3. Syringe units. mL × 100 = units

For a different water volume or amount, the free peptide reconstitution calculator works backwards from the amount you want and suggests a water volume that lands on a clean syringe mark.

Other hCG vial sizes

hCG 5,000 IU

Half-life, time to peak and sources are on the main hCG (Human Chorionic Gonadotropin) guide.

Frequently asked questions

How much bacteriostatic water do I add to a 10,000 IU hCG vial?+
There is no single right amount. More water makes each draw bigger and easier to measure; less water keeps the volume small. With 10 mL, a 10,000 IU vial is 1,000 IU/mL, so every 10 units on a U-100 insulin syringe holds 100 IU. With 1 mL it is 10,000 IU/mL (1,000 IU per 10 units). With 2 mL it is 5,000 IU/mL (500 IU per 10 units). With 5 mL it is 2,000 IU/mL (200 IU per 10 units).
How many units is 500 IU of hCG from a 10,000 IU vial?+
With 10 mL of water the vial is 1,000 IU/mL, so 500 IU is 0.5 mL, or 50 units on a U-100 syringe. With a different water volume the units change but the amount does not. The amount is an example for the math, not a recommendation.
How many 500 IU draws are in a 10,000 IU hCG vial?+
20 (10,000 IU ÷ 500 IU), whatever volume of water you add. In practice a little is lost to the syringe dead space and the last drops in the vial.

hCG (Human Chorionic Gonadotropin) guide · All compound guides · Reconstitution calculator