HCG Dosage Calculator
Human chorionic gonadotropin, dosed in international units (IU); studied in hormone research.
Total amount printed on the vial label.
Changes concentration only — your dose stays the same.
500 mcg = 0.5 mg
1 mL barrels are sold marked two ways: 0–100 insulin units (U-100) or 0–1 mL (tuberculin / luer). Same volume — 100 units = 1 mL — so the result below gives you both readings.
1.0 mL (100-unit) · top row = insulin units, bottom row = mL · smallest mark = 2 units · check yours, gradations vary by brand
Show the math — every step, with your numbers
- Concentration: 5 mg ÷ 3 mL = 1.67 mg/mL (1666.6667 mcg/mL)
- Dose volume: 500 mcg ÷ 1666.6667 mcg/mL = 0.300 mL
- Syringe units: 0.300 mL × 100 = 30 units
How much water should I add?
The same 500 mcg dose from your 5 mg vial, at each water volume. More water spreads the dose over more units, which is easier to read accurately. Tap a row to use it.
✓ = the draw lands exactly on a mark of your 1.0 mL (100-unit) syringe — no eyeballing between gradations.
Calculated on a U-100 insulin syringe (100 units = 1 mL). This is reconstitution arithmetic for HCG, not a dosing recommendation. Verify against your product label and a qualified professional.
HCG reconstitution chart
Concentration for each vial size when reconstituted with 3 mL of bacteriostatic water. Change the water amount in the calculator to see other concentrations, or open the full reconstitution chart to compare every dose and water volume at once.
| Vial size | Bac. water | Concentration | Per unit (0.01 mL) |
|---|---|---|---|
| 5 mg | 3 mL | 1.67 mg/mL | 16.7 mcg |
| 10 mg | 3 mL | 3.33 mg/mL | 33.3 mcg |
About HCG dosing
HCG (HCG) is human chorionic gonadotropin, dosed in international units (IU); studied in hormone research. It is commonly sold in 5 mg, 10 mg vials. Commonly-cited community and research protocols reference a range of 250–1,000 mcg, a few times per week in cited protocols. HCG is usually labelled in IU rather than mg; convert using your vial's IU rating before using this tool.
Remember that the number of syringe units for any dose depends entirely on how much bacteriostatic water you add. The calculator above is pre-filled with a common setup for HCG; adjust the inputs to match your own vial and the units update instantly.
Check HCG for yourself
The figures on this page are commonly-cited references for the arithmetic, not prescriptions. These are primary, non-commercial sources where you can verify them independently.
- HCG studies on ClinicalTrials.gov ↗
Registered human studies, their doses and protocols. If a compound has few or no registered trials, that is worth knowing before relying on any figure.
- HCG on PubChem ↗
Chemical identity and molecular weight from the NIH.
HCG calculator — FAQ
How do I reconstitute HCG?+
HCG is usually labelled in IU rather than mg; convert using your vial's IU rating before using this tool. Add your chosen amount of bacteriostatic water to the vial, swirl gently (never shake), and use the calculator above to convert your target dose into insulin-syringe units.
What is a common HCG dose?+
Commonly-cited protocols reference 250–1,000 mcg, a few times per week in cited protocols. These are references for the arithmetic, not a prescription — confirm with your product label and a qualified professional.
How many units of HCG should I draw?+
That depends on your vial size and how much bacteriostatic water you added. Enter both into the calculator above along with your dose and it shows the exact units on a U-100 insulin syringe.