How many units is a 300 mcg ipamorelin dose?

With a 5 mg ipamorelin vial reconstituted in 2 mL of bacteriostatic water (2500 mcg/mL), a 300 mcg dose works out to 300 divided by 25 mcg per unit, which is 12 units on a U-100 insulin syringe.

How much bacteriostatic water goes into a 5 mg ipamorelin vial?

It depends on the concentration you want. A common reference point is 2 mL, which gives 2500 mcg/mL and keeps typical research doses in a readable unit range. Use the calculator to test other volumes and find one that lands your dose on a round syringe mark.

Does an ipamorelin dosage calculator handle both mg and mcg?

Yes. Vial labels are almost always in milligrams while research doses are usually described in micrograms. 1 mg equals 1000 mcg, and the calculator converts between the two automatically once a vial size, water volume, and target dose are entered.

Ipamorelin Dosage Calculator: Units Per Dose

Q: Is ipamorelin FDA-approved?

No. Ipamorelin has no FDA-approved pharmaceutical formulation for any indication and remains a research compound studied in preclinical and limited early human research.

By PeptCalc Research — Medically reviewed by David Mansour, MD — Last reviewed August 10, 2026

Ipamorelin vials are labeled in milligrams, but the doses discussed in research literature are usually written in micrograms — and that unit gap is exactly where an ipamorelin dosage calculator earns its keep. This is a reference for the arithmetic behind that conversion: how vial size and bacteriostatic water volume set concentration, and how concentration turns a target dose into an exact 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 dosage calculator handles the conversion in two directions:

Forward mode — enter vial size, water volume, and target dose, and it returns the syringe units to draw.
Reverse mode — enter vial size, target dose, and a desired unit count, and it returns the water volume that produces it.

Both modes run on the same formula: concentration equals mass divided by water volume, and units equal that volume in mL multiplied by 100 on a U-100 syringe. Nothing about the formula changes because the vial holds ipamorelin instead of another peptide — only the vial's own mass and water volume matter.

Ipamorelin at a glance

Ipamorelin is a growth hormone secretagogue that acts on the ghrelin receptor, a separate pathway from the GHRH-receptor peptides it's often studied alongside, such as CJC-1295. It has no FDA-approved pharmaceutical formulation for any indication and remains a research compound studied in preclinical and limited early human research. None of the numbers below describe a use recommendation — they describe the reconstitution arithmetic, which is identical regardless of a compound's regulatory status.

Typical research concentration

Ipamorelin most commonly reaches researchers as lyophilized powder in 2 mg, 5 mg, or 10 mg vials. Reconstituted in 2 mL of bacteriostatic water, a reference point chosen because it keeps typical research doses on readable syringe marks:

Vial size	Water added	Concentration
2 mg	2 mL	1 mg/mL (1000 mcg/mL)
5 mg	2 mL	2.5 mg/mL (2500 mcg/mL)
10 mg	2 mL	5 mg/mL (5000 mcg/mL)

These are reference points, not requirements — the peptide dosage calculator recalculates concentration for any vial size and water volume actually on hand.

The math

Step 1: Calculate concentration

Concentration = vial mass ÷ water volume

5 mg vial + 2 mL water = 5 ÷ 2 = 2.5 mg/mL (2500 mcg/mL)

Step 2: Convert concentration to mcg per unit

A U-100 insulin syringe divides 1 mL into 100 units, so:

mcg per unit = concentration (mcg/mL) ÷ 100

2500 mcg/mL ÷ 100 = 25 mcg per unit

Step 3: Convert the target dose to units

Units = target dose (mcg) ÷ mcg per unit

Worked example. A 5 mg ipamorelin vial reconstituted in 2 mL of bacteriostatic water is 2500 mcg/mL, which is 25 mcg per unit. A 300 mcg dose is 300 ÷ 25 = 12 units. A 200 mcg dose from the same vial is 200 ÷ 25 = 8 units.

Compare that to a 2 mg vial in the same 2 mL of water: 2 ÷ 2 = 1 mg/mL, or 1000 mcg/mL, which is 10 mcg per unit. That same 300 mcg dose is now 300 ÷ 10 = 30 units — a much larger draw from a lower-concentration vial, even though the dose in mcg hasn't changed at all.

Choosing a water volume

Water volume is the lever that sets how large a given dose reads on the syringe. For a 5 mg vial and a 300 mcg dose:

Water added	Concentration	mcg per unit	Units for 300 mcg
1 mL	5000 mcg/mL	50 mcg/unit	6 units
2 mL	2500 mcg/mL	25 mcg/unit	12 units
4 mL	1250 mcg/mL	12.5 mcg/unit	24 units

None of these rows is more correct than another — 300 mcg is 300 mcg regardless of which row it comes from. A larger draw (24 units) is generally easier to measure precisely on a U-100 barrel than a small one (6 units), since a one-unit misread is a bigger proportional error at the low end. Reverse mode on the calculator finds the water volume that lands a specific dose on a round unit mark.

Reconstitution process

Gather the ipamorelin vial, bacteriostatic water, a U-100 insulin syringe, and alcohol swabs.
Swab both vial stoppers with alcohol.
Draw the water volume the chosen concentration calls for.
Inject it slowly down the inside wall of the vial, not directly onto the powder.
Swirl gently until fully dissolved — don't shake.
Confirm the resulting concentration matches what was entered into the calculator before drawing a dose.

For the general mixing walkthrough that applies to any peptide vial, see how to reconstitute peptides.

Storage

Reconstituted ipamorelin is generally kept refrigerated and protected from light. Unreconstituted lyophilized powder is far more stable than the mixed solution, which is why vials ship dry. Track the date each vial was reconstituted, particularly if more than one vial is in use at different concentrations.

Common mistakes

Confusing mg and mcg. Ipamorelin vial labels are in milligrams; research doses are usually written in micrograms. 1 mg equals 1000 mcg, and misreading one for the other produces a 1000x error.
Reusing a unit count across a different water volume. As the table above shows, 300 mcg is 12 units at one concentration and 30 units at another. A unit count only means something relative to the specific concentration it was calculated from.
Shaking the vial. Swirl gently instead — shaking can degrade the peptide.
Assuming ipamorelin's dosing shares CJC-1295's schedule. The two are commonly studied together, but they act on different receptors, and a frequency referenced for one doesn't automatically transfer to the other. See CJC-1295 vs Ipamorelin for how the two compare.
Using a syringe that isn't U-100. Every unit conversion here assumes 100 units equal 1 mL. A different syringe scale changes the math entirely.

Enter a vial size, water volume, and target dose into the peptide dosage calculator to skip the arithmetic and get exact syringe units, with reverse mode available for finding a water volume that lands a dose on a clean mark. For ipamorelin compared against a GHRH-receptor peptide it's often paired with, see CJC-1295 vs Ipamorelin or Tesamorelin vs Ipamorelin. For the general reconstitution process, see how to reconstitute peptides.