CJC-1295 & Ipamorelin Dosage Calculator: Syringe Math

CJC-1295 and Ipamorelin are two research peptides frequently used together and often sold pre-blended in a single vial. This reference explains how to convert a CJC-1295/Ipamorelin vial and target dose into the exact number of units to draw on a U-100 insulin syringe. It is written for research purposes only and is not medical advice.

What the calculator does

The peptide reconstitution calculator handles the math in two directions:

• Forward mode — enter vial size, water volume, and target dose → it returns the syringe units to draw.
• Reverse mode — enter vial size, target dose, and desired syringe units → it tells you how much water to add.

Both modes work from the same formula: concentration equals mass divided by volume, and dose in units equals dose in volume times 100 (on a U-100 syringe). For a pre-blended vial, treat the labeled total mass (e.g. 10 mg for a 5 mg/5 mg blend) as the vial size — the calculator's output units apply to both peptides at once, since one draw pulls the blend in the ratio printed on the label.

Blend vials vs. separate vials

CJC-1295 and Ipamorelin reach the researcher in one of two formats:

• Pre-blended vial — the two peptides are combined by the supplier into one vial, commonly at a 1:1 ratio by weight (5 mg/5 mg or 2 mg/2 mg). One reconstitution and one draw covers both compounds.
• Separate vials — each peptide is reconstituted on its own, and the two draws are combined in the syringe (or injected separately). This format lets the ratio between the two be adjusted independently.

The label on the vial states which format it is and, for blends, the ratio. The calculator's math is identical either way — it converts one vial's mass, water, and target dose into units. For separate vials, run the calculator once per peptide.

Typical research concentration

A common setup for a 10 mg total blend vial (5 mg CJC-1295 / 5 mg Ipamorelin) uses 2 mL of bacteriostatic water, giving 5 mg/mL total concentration — 2.5 mg/mL of each peptide:

Target dose (of the blend)	Concentration	Units at 2 mL water
0.5 mg	5 mg/mL	10 units
1 mg	5 mg/mL	20 units
2 mg	5 mg/mL	40 units

These numbers describe the total blend draw, not a separate calculation for each peptide — in a 1:1 blend, half of every draw is CJC-1295 and half is Ipamorelin by weight.

The math

Step 1: Calculate concentration

Concentration = vial mass ÷ water volume

• 10 mg blend vial + 2 mL water = 5 mg/mL
• 10 mg blend vial + 1 mL water = 10 mg/mL
• 4 mg blend vial + 2 mL water = 2 mg/mL

Step 2: Convert dose to volume

Volume (mL) = dose (mg) ÷ concentration (mg/mL)

Example: 1 mg dose at 5 mg/mL concentration = 1 ÷ 5 = 0.2 mL

Step 3: Convert volume to syringe units

On a U-100 insulin syringe, 1 mL = 100 units, so:

Units = volume (mL) × 100

Example: 0.2 mL × 100 = 20 units

The calculator performs these three steps instantly for any vial, water, and dose combination you enter.

Reconstitution process

1. Gather supplies — the CJC-1295/Ipamorelin vial (blend or separate), bacteriostatic water, U-100 insulin syringes, alcohol swabs.
2. Swab both vial stoppers with alcohol.
3. Draw the calculated water volume (e.g. 2 mL for a 5 mg/mL blend).
4. Inject slowly down the inside wall of the vial, not directly onto the powder.
5. Swirl gently — do not shake. Let it dissolve completely.
6. Verify the concentration matches what you entered in the calculator.

For a detailed walkthrough, see How to Reconstitute Peptides.

Storage

Reconstituted peptide vials are generally stored refrigerated and protected from light. Unreconstituted lyophilized powder is stable at room temperature until the expiration date on the vial. Track the reconstitution date for each vial separately if you're running blend and single-peptide vials at the same time.

Why concentration matters

The same target dose can be drawn at very different unit marks depending on how much water goes into the vial:

1 mg dose from a 10 mg blend vial:

Water added	Concentration	Draw volume	Units
1 mL	10 mg/mL	0.1 mL	10 units
2 mL	5 mg/mL	0.2 mL	20 units
5 mL	2 mg/mL	0.5 mL	50 units

Neither is "wrong" — the math is identical. The calculator shows the units for any water volume so you can choose the draw size that's easiest to read accurately on your syringe.

Reconstitution math, not the injection itself, is where dosing errors tend to originate — the water volume sets the concentration, and every unit reading downstream depends on getting that ratio right at the start.

Common mistakes

• Reading a blend ratio as a total. A "5 mg/5 mg" vial contains 10 mg total, not 5 mg. Check whether the label states per-peptide mass or total mass before entering it into the calculator.
• Confusing mg and mcg. CJC-1295 and Ipamorelin doses are generally described in milligrams (mg) or micrograms (mcg) depending on the supplier — check which unit the label uses. 1 mg = 1000 mcg.
• Shaking the vial. Swirl gently instead — shaking can degrade the peptide.
• Mixing up which vial was reconstituted at which concentration. If you're running a blend vial and a separate vial side by side, label each one. Drawing units meant for one concentration from a vial mixed at another is a common source of a wrong draw.
• Using a non-U-100 syringe. The calculator assumes a standard U-100 insulin syringe (100 units = 1 mL). If your syringe is marked differently, the unit conversion will not match.

Use the calculator

Enter your CJC-1295/Ipamorelin vial size, bacteriostatic water volume, and target dose into the peptide reconstitution calculator to see the exact syringe units. Reverse mode also works — enter your target dose and the units you want to draw, and it tells you how much water to add.

For related math, see the retatrutide dosage calculator guide, the GHK-Cu reconstitution calculator guide, or the general how to reconstitute peptides walkthrough. The calculator handles the math. This guide explains what the numbers mean and where they come from.