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[TRT · hCG · 5,000 IU vial]

hCG 5,000 IU reconstitution: how much water and how many units

Water volume chart · Syringe units · Draws per vial

Short answer: 5 mL of bacteriostatic water in a 5,000 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 5,000 IU.

Water volume chart for a 5,000 IU vial

5,000 IU hCG vial, U-100 insulin syringe.
Water addedConcentrationPer 10 unitsPer 1 unit
1 mL5,000 IU/mL500 IU50 IU
2 mL2,500 IU/mL250 IU25 IU
5 mL1,000 IU/mL100 IU10 IU
10 mL500 IU/mL50 IU5 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 5,000 IU vial.
Water added250 IU500 IU1,000 IU
1 mL5 units10 units20 units
2 mL10 units20 units40 units
5 mL25 units50 units100 units
10 mL50 units100 unitsover 1 mL

A 5,000 IU vial holds 20 draws of 250 IU, 10 draws of 500 IU, 5 draws of 1,000 IU, no matter how much water you add.

The math

  1. Concentration. 5,000 IU ÷ 5 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 10,000 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 5,000 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 5 mL, a 5,000 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 5,000 IU/mL (500 IU per 10 units). With 2 mL it is 2,500 IU/mL (250 IU per 10 units). With 10 mL it is 500 IU/mL (50 IU per 10 units).
How many units is 500 IU of hCG from a 5,000 IU vial?+
With 5 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 5,000 IU hCG vial?+
10 (5,000 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