HCG Calculator

Enter your HCG vial size, BAC water, and target dose, get the exact mL and units to draw on your syringe.

HCG dosing

HCG mixing & dose

Reconstitution to insulin-syringe units and doses per vial.

HCG vial size

Bacteriostatic water

Target dose

Draw syringe to

10 units

(0.10 mL)

Your dose (250 IU)

100 units = 1mL

Concentration

2,500IU/mL

Per dose

0.1mL

Doses / vial

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This calculator is for informational purposes only, so always double-check your result with a healthcare provider. HCG requires a prescription and medical supervision. We assume no liability for dosing errors.

The tool

How it works, what it tells you, what it doesn't.

The HCG calculator tells you exactly how much to draw for each injection after reconstituting your HCG vial. HCG comes as a lyophilized powder that you reconstitute with bacteriostatic water before injecting. Enter your vial size in IU (e.g., 5000 IU), how much BAC water you added, and your target dose, the calculator shows the resulting concentration, mL per dose, units on an insulin syringe, and total doses per vial.

How to use it

How to Use This HCG Calculator

01

Enter your vial size

The total IU printed on your HCG vial (e.g., 5,000 IU)
02

Enter BAC water volume

How much bacteriostatic water you added (typically 1–2 mL)
03

Enter your target dose

Your prescribed dose per injection (e.g., 250 IU)
04

Read your syringe units

See exactly how many units to draw on your insulin syringe

Worked Example: 5,000 IU Vial

The most common HCG setup for TRT protocols

The Math

For 250 IU, draw:10 unitson your insulin syringe (20 doses per vial)

Data Sources

This tool uses dosing information from official prescribing information:

IU-to-Volume Conversion - Standard IU concentration formulas for reconstituted HCG
Insulin Syringe Standards - U-100 syringe conversion: 100 units = 1 mL

Get the app

Track Your HCG Protocol

Regimen logs every HCG injection, tracks vial expiry, and manages multi-compound schedules. Free for one compound.

Built-in dose calculators
Smart injection reminders
Track progress over time
Private, secure health data

Free to download. Free for your first compound.

Regimen app Today view with doses and estimated levels

Questions

HCG Questions & Answers

How do I mix HCG with bacteriostatic water?

Slowly inject the BAC water down the side of the vial, not directly onto the powder. Gently swirl (don't shake) until dissolved. Common volumes are 1–2 mL for a 5,000 IU vial.

How many units of HCG is 250 IU?

It depends on how much BAC water you added. With a 5,000 IU vial mixed with 2 mL of BAC water, 250 IU = 5 units on an insulin syringe. This calculator does the math for any combination.

What's the standard HCG dose for TRT?

Most TRT protocols use 250–500 IU two to three times per week (500–1500 IU total weekly). The purpose is typically to maintain testicular function and fertility while on testosterone. Your doctor will adjust based on labs.

How long does reconstituted HCG last?

Commonly 30 to 60 days when refrigerated and mixed with bacteriostatic water, depending on the product, so go by the expiry your pharmacy gives you. If mixed with sterile water (no preservative), use within 24 hours. Always refrigerate after mixing.

Can I use a 5,000 IU or 10,000 IU vial?

Yes. Enter the IU amount from your vial label into this calculator. Common sizes are 2,000, 5,000, and 10,000 IU. Larger vials just mean more doses per vial.

What syringe should I use for HCG?

A standard U-100 insulin syringe (0.5 mL or 1 mL). These are marked in units where 100 units = 1 mL. HCG is injected subcutaneously, so a 29–31 gauge, ½-inch needle works well.

How much BAC water should I add to HCG?

Most people use 1–2 mL. More water makes it easier to measure small doses accurately. Less water means fewer injections before you need a new vial. There's no clinical difference in effectiveness.