Pindrop

HCG Dose Calculator

HCG is measured in international units, not milligrams. Enter the vial IU, the water you mixed in, and your dose to get the units to draw.

IU

Total IU in the vial.

mL
IU

Draw on the syringe

10units

0.1 mL at 2,500 IU/mL
0102030405060708090100
Concentration
2,500IU/mL
Doses per vial
20
Volume
0.1mL

What this calculator does

HCG arrives as a powder measured in international units, and it stays in IU the whole way through. There is no milligram conversion. What changes is the concentration, which you set when you add bacteriostatic water to the vial. This calculator divides the vial IU by your water volume to get IU per milliliter, then works out the fraction of a milliliter that carries your dose and reads it as units on an insulin syringe.

Enter the vial strength in IU, the water you mixed in, and the dose you want per injection. A common setup is a 5000 IU vial with 2 mL of water, which puts a 250 IU dose at 10 units on the syringe.

Reading the result

The main number is where to stop on the plunger, shown to one decimal so small HCG doses stay precise. Underneath you get the concentration, the volume, and how many doses the vial holds. Because HCG is reconstituted and kept in the fridge, the vial-longevity and storage calculators pair well with this one for planning how long a mix lasts.

Common questions

How do you reconstitute an HCG vial?
Add bacteriostatic water slowly down the side of the vial, let it dissolve without shaking, and store it in the fridge. The amount of water you add sets your concentration. A common approach is 1 to 3 mL of bac water for a 5000 IU vial, then you draw units based on that mix.
How much bacteriostatic water do I add to a 5000 IU HCG vial?
There is no fixed amount, it depends on the dose you want to draw. Adding 2 mL to a 5000 IU vial gives 2500 IU per mL, so a 250 IU dose is 0.1 mL, or 10 units on a U-100 syringe. More water means a bigger, easier-to-read draw, and less water means a smaller one.
How many units do I draw for 250 IU or 500 IU of HCG?
It depends on how you mixed it. With a 5000 IU vial reconstituted in 2 mL, that is 2500 IU per mL, so 250 IU is 10 units and 500 IU is 20 units on a U-100 insulin syringe. Change the water volume and those numbers change, so enter your own mix to be sure.
Why is HCG measured in IU instead of mg?
HCG is measured by its biological activity, not its weight, so it is labeled in international units. Two batches can weigh differently but still deliver the same 5000 IU of effect. That is why you dose it in IU and why the vial does not list a mg amount.
How long does reconstituted HCG last?
Once mixed with bacteriostatic water and kept cold, HCG is commonly considered good for about 30 to 60 days. Keep it in the fridge, do not freeze it, and do not leave it at room temperature for long. Potency slowly drops over time, so sooner is better than later.

Pindrop is a calculation tool, not medical advice. Confirm your dose and protocol with a licensed healthcare provider.