GHK-Cu Dosage Calculator

How to Use the GHK-Cu Dosage Calculator

The calculator turns four inputs into a clean result.

Select the amount of GHK-Cu in your vial, the bacteriostatic water you added to reconstitute it, your target dose in micrograms, and your syringe size. It returns the vial concentration, the exact units to draw on a U-100 insulin syringe, and how many doses the vial holds.

This tool covers injectable GHK-Cu, prepared by reconstitution. GHK-Cu is also used topically at low percentage concentrations in serums, which is a different calculation this tool does not handle. Change any value and the result updates instantly, so you can compare a 50 mg and a 100 mg vial, or 2 ml against 5 ml of water, without redoing the arithmetic.

How This Calculator Works

The calculator runs three steps, and you can check each one by hand.

Concentration = vial amount ÷ water added. Draw volume = your target dose ÷ concentration. Syringe units = draw volume × 100 on a U-100 insulin syringe.

Worked in arbitrary numbers: say your target is 2,000 mcg, drawn from a 50 mg vial reconstituted with 2 ml of bacteriostatic water. Concentration is 50 mg ÷ 2 ml, which is 25 mg/ml, or 25,000 mcg/ml. Draw volume is 2,000 mcg ÷ 25,000 mcg/ml, which is 0.08 ml. Units are 0.08 ml × 100, which is 8 units. The 2,000 mcg here is an example input to show the arithmetic, not a suggested dose.



Every figure above appears in the result box, concentration, draw volume, and units side by side, so you can verify the conversion yourself rather than trusting a single number.

GHK-Cu is typically sold as a lyophilized powder in larger vials than most peptides, commonly 50 mg and 100 mg, with 10 mg at the low end, and the vial size drives every downstream number. Concentration is the peptide amount divided by the bacteriostatic water you add. A 50 mg vial reconstituted with 2 ml of water gives 25 mg/ml, or 25,000 mcg/ml, a strong solution. The same 50 mg vial in 5 ml gives 10 mg/ml, which many researchers prefer because the larger volume makes a small dose easier to measure on the syringe. When GHK-Cu goes into solution it takes on a distinct blue tint from the copper complex, which is a normal sign of a correctly reconstituted vial. Enter your real vial size and water volume, since changing either one changes the units you draw. For the properties of the bacteriostatic water itself, see the guide to bacteriostatic water for peptides. For the reconstitution math common to every peptide, see the main peptide calculator.

GHK-Cu dose figures vary more than most peptides, and they split by route. Injectable research-peptide protocols commonly reference roughly 1 to 2 mg per injection, while some sources cite figures in the hundreds of micrograms. Topical serums are described in percentage concentration, usually well under 1 percent, which is a separate measurement this calculator does not handle. All of these are community-reported figures, not established human doses, since GHK-Cu's documented research is largely topical and laboratory-based rather than human injection trials. This calculator does not select any figure for you. It converts a target you already have. For what the research on GHK-Cu actually covers, see the GHK-Cu peptide guide.

GHK-Cu is the copper complex of GHK, a naturally occurring tripeptide made of glycine, histidine, and lysine. It is studied as a copper peptide in the context of collagen and skin research, wound healing, and tissue regeneration, and it is the most researched compound in the copper-peptide category. That regenerative interest is why accurate preparation matters to researchers working with the injectable form. This page is the calculation tool. For what GHK-Cu is, how the copper complex works, and what the research shows across topical and laboratory settings, see the GHK-Cu peptide guide.

The calculator's accuracy depends entirely on your inputs, and GHK-Cu carries one risk sharper than most peptides. Because the vials are large and the solution is concentrated, the volume you draw is very small, often under 10 units, and at those sizes a small misread on the syringe changes the delivered amount by a large percentage. Two habits reduce that risk. First, confirm the vial size printed on your product against what you enter, since a 50 mg vial entered as 100 mg halves every dose you draw. Second, if your draws are coming out very small and hard to read, add more water to make a thinner solution, which spreads the same dose across more units on the syringe. The result box shows the concentration and the exact units together, so you can check the volume against the math.

This calculation gives you the exact volume to draw, but accuracy depends on the right supplies and correct reconstitution. Before measuring a dose, review how to take a peptide shot for syringe setup and injection technique, and how to reconstitute peptides for the mixing steps. For the compound itself, see the GHK-Cu peptide guide.

GHK-Cu Dosage Calculator FAQ