Human Chorionic Gonadotropin

HCG Calculator

For educational purposes only. Not medical advice. Full disclaimer
RP
Ryan Peters, PharmD Updated January 2025

Calculate HCG reconstitution and dosing in International Units (IU).

HCG Dosing Guide

TRT Support:

250-500 IU, 2-3x per week

Fertility Protocols:

Varies - consult your doctor

HCG is measured in International Units (IU), not mcg. Select your vial and dose below.

Check your vial label

How much water to add

Per injection

4

Your Results

Concentration

1000

IU per ml

Draw Per Dose

50

units on syringe

Doses Per Vial

10

total doses

How to Use This Calculator

  1. Select your vial size – Choose the IU amount in your HCG vial. Common sizes are 5,000 IU and 10,000 IU.
  2. Enter BAC water amount – Input how much bacteriostatic water you'll add. Using 5ml with a 5,000 IU vial gives a nice round 1,000 IU/ml concentration.
  3. Select your dose – Choose your desired dose in IU. Common TRT support doses are 250-500 IU.
  4. Read your results – The calculator shows your concentration (IU per ml), units to draw on an insulin syringe, and how many doses you'll get from the vial.

Easy Mixing Tip

Using 5ml of BAC water with a 5,000 IU vial gives you exactly 1,000 IU per ml (10 IU per unit). This makes dosing simple: 50 units = 500 IU.

Common HCG Protocols

Use Case Dose Frequency
TRT Support 250-500 IU 2-3x per week
Fertility (Male) 500-1000 IU 2-3x per week
PCT Protocol 1000-1500 IU Every other day (limited duration)

* Protocols vary significantly. Always follow your healthcare provider's specific recommendations.

About HCG

Human Chorionic Gonadotropin (HCG) is a hormone that mimics luteinizing hormone (LH). It's commonly used to:

  • Maintain testicular function during TRT
  • Support fertility in men
  • Assist with post-cycle therapy (PCT)
  • Treat certain medical conditions under physician supervision

Frequently Asked Questions

When reconstituted with bacteriostatic water and stored in the refrigerator, HCG typically remains stable for 30-60 days. Using sterile water instead reduces this to about 48 hours.
Bacteriostatic water is preferred for multi-dose vials because it contains benzyl alcohol, which prevents bacterial growth. Sterile water is only suitable if you'll use the entire vial within 48 hours.
HCG is typically injected subcutaneously (into fat tissue) in the abdomen or thigh. Some protocols use intramuscular injection. Subcutaneous is generally preferred for ease and comfort.
TRT suppresses natural testosterone production, which can cause testicular atrophy and reduce fertility. HCG mimics LH, keeping the testes active and maintaining their size and function while on TRT.

Done Calculating? Track Your Daily Doses

Set up your protocol once, then come back daily to log injections, monitor vial usage, and stay on schedule.

Open Daily Dose Tracker
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