Peptide Stack & Blend Calculator: Free Reconstitution & Dosage Tool (2026)

A peptide stack calculator handles the math for multi-peptide blends reconstituted in a single vial. Unlike a single-vial reconstitution calculator, which assumes one peptide in one vial, the stack calculator computes individual concentrations and per-draw deliveries for every peptide in the blend. You enter each peptide's mg amount separately, the total BAC water volume, and your target draw. The calculator returns the exact mg, mcg, and syringe units for every component. This is the correct tool for GLOW, KLOW, Wolverine, CJC-1295/Ipamorelin, and any custom blend. For single-peptide vials, use the standard peptide reconstitution calculator instead.

Enter each component's individual mg amount, not the total vial weight. A 20 mg Wolverine vial is 10 mg BPC-157 plus 10 mg TB-500, so enter both as separate 10 mg components. Add your total BAC water volume, often 2 mL for many blends, then enter your target draw in mcg or units. The calculator returns the per-component concentration, the dose delivered for each peptide at your draw volume, and the assessment of whether each dose lands inside typical protocol ranges.

GLOW is typically a 5:1:1 ratio: 50 mg GHK-Cu plus 10 mg BPC-157 plus 10 mg TB-500 in a 70 mg total vial. Reconstituted with 2 mL BAC water, GHK-Cu is at 25 mg/mL and the two supporting peptides are at 5 mg/mL each. A 0.1 mL, 10 unit draw delivers 2.5 mg GHK-Cu, 500 mcg BPC-157, and 500 mcg TB-500. The calculator handles this automatically and supports non-standard ratios. See the GLOW Stack protocol for dosing context.

Yes. Wolverine is typically a 1:1 ratio with equal mg of BPC-157 and TB-500 co-reconstituted. Enter both components with their individual mg values, usually 10 mg each for a 20 mg total vial. Because the ratio is 1:1, a single draw delivers the same mcg of both peptides. With 2 mL BAC water, a 10 unit draw delivers 500 mcg of each. The calculator verifies this math automatically and accounts for alternate ratios if your supplier ships a different blend. Full protocol: Wolverine Stack.

The single reconstitution calculator assumes one peptide in one vial and returns one concentration and one syringe unit output. The stack calculator assumes two or more peptides in one vial and returns a separate concentration for every component. If you use the single calculator on a blend vial, the concentration will be wrong for every individual peptide because it divides the total vial weight by the water volume instead of the individual peptide weights.

Most pre-blended vials reconstitute cleanly with 2 mL BAC water, but the right volume depends on your target draw and the shortest-stability component. TB-500 is the most common limiting factor because it is usually treated as stable for a shorter refrigerated window once reconstituted. The calculator's reverse-BAC feature lets you enter a target syringe unit draw and computes the BAC water volume that produces it. For mixing technique, read the reconstitution guide.

Yes. The calculator supports 2-5 peptides in any combination with any mg ratio. Enter each peptide's name and mg amount separately, then your total BAC water and target draw. The calculator returns per-component concentration and per-draw delivery regardless of which peptides you are combining. For safety context on custom blends, including which peptides should not be combined due to stability or pathway conflicts, read Peptide Stacking 101 before reconstituting.

Because every peptide in a blend shares the same total BAC water volume, they are all diluted into the same solution. When you draw a volume from the vial, you pull a proportional amount of every peptide in that draw. The anchor peptide is typically the one with the narrowest target range, such as GHK-Cu in GLOW. Once you set your anchor dose, every other peptide's dose is mathematically fixed by the blend ratio.

If you are running two peptides in two separate vials on the same day, you do not need the stack calculator. Run the single reconstitution calculator twice, once per vial. The stack calculator is specifically for peptides that share a vial. Some protocols run co-administered but separately reconstituted peptides, such as BPC-157 and TB-500 in two different vials injected back-to-back. That is a single-calculator workflow.

Yes. The peptide stack calculator is completely free with no signup required. The save feature also works without an account: click Save calculation, enter your email address, and PepPal sends the stack setup and notes to your inbox.