Peptide Blend Calculator

A blend arrives as one vial holding several peptides at a fixed ratio, which makes the usual question — "how much of each am I actually drawing?" — harder than it looks. It shouldn't be. Each component behaves like its own vial that happens to share the same water.

Illustrative reference only — nothing here recommends a dose, a blend, or a mixing volume.

The math

You cannot separate the components of a pre-mixed blend, and you don't need to. Because everything dissolves in the same water, each peptide gets its own concentration from the same division — its milligrams divided by the total water you added.

That leads to the only rule worth memorising: a draw that is one tenth of the vial contains one tenth of every component. The ratio between the components is fixed by the manufacturer and never changes, no matter how much water you add. Water changes how big the draw is, not what is in it proportionally.

Worked example — a 50/10/10 blend

Illustrative numbers only — not a dose recommendation.

Take a vial holding GHK-Cu 50 mg, BPC-157 10 mg and TB-500 10 mg — 70 mg in total — reconstituted with 3 mL of bacteriostatic water. The total concentration is 70 mg ÷ 3 mL = 23.333 mg/mL, and a 10-unit (0.1 mL) draw is one thirtieth of the vial:

Every component works out to exactly one thirtieth of what the vial holds, because the draw is one thirtieth of the volume. Add a fourth component and nothing about the method changes.

Why the total is the number you enter

In a plain reconstitution calculator, a blend still has one right answer for concentration: enter the total milligrams. That gives you the correct total strength and the correct volume to draw. What it cannot show you is the split — which is the part people actually want, and what the blend calculator adds.

Common blends

Two fixed-ratio blends come up often enough to have their own pages, both with the same arithmetic as above:

Frequently asked questions