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Peptide Blend Calculator

A blend vial holds its components in the ratio the vendor publishes. That ratio, the vial total and a draw volume give what each component comes to. The ratio is read off the vial — a blend that publishes none cannot be split here, and this tool will not assume an even one.

Last reviewed: September 21, 2026

A blend vial holds its components in the ratio the vendor publishes. That ratio and a draw volume give what each component comes to.

Read it off the vial or the product page. Slashes, colons or spaces all work. A blend that publishes no ratio cannot be split here.

How the arithmetic works

  • Blend concentration (mg/mL) = total mg ÷ water volume (mL)
  • Each component’s mg in the vial = total mg × (that component’s ratio share ÷ the ratio’s sum)
  • Each component’s mg in a draw = its mg in the vial × (draw volume ÷ water volume)

The ratio is read off the vial or product page, exactly as printed — never assumed. A blend that publishes no ratio has nothing for this calculator to divide by, and it returns nothing rather than guessing an even split.

Worked examples

A 10 mg blend vial in a 5/5 ratio (two equal-part components), reconstituted with 2 mL of water, drawn at 0.5 mL:

Blend concentration10 mg ÷ 2 mL = 5 mg/mL
Component 1 & 2 — in the vial10 mg × (5 ÷ 10) = 5 mg each
Component 1 & 2 — in a 0.5 mL draw1.25 mg each
That draw reads0.5 mL × 100 = 50 units

The same 10 mg vial in a 10/10/2 ratio — three components, not in equal parts — at the same water volume:

Component 1 — in the vial10 mg × (10 ÷ 22) = 4.5455 mg
Component 2 — in the vial10 mg × (10 ÷ 22) = 4.5455 mg
Component 3 — in the vial10 mg × (2 ÷ 22) = 0.9091 mg

Enter either set of numbers into the calculator above and it returns the same figures.

Why this calculator needs a published ratio

A blend’s components are rarely in equal parts — the 10/10/2 example above is a common shape, not an edge case. Assuming an even split when the true ratio is uneven would misstate every component’s amount, silently. So this calculator does the opposite: it takes the ratio exactly as the vendor states it, and if a blend publishes none, it returns nothing rather than a guessed figure. This mirrors the same refusal Prof. Peptide’s own price data applies to a blend with no stated split — an unpublished ratio is an unanswerable question, not a 50/50 default.

FAQ

How much of each peptide is in a blend vial?
The vial's total mg split according to the ratio printed on the vial or product page — not an even split by the number of components. A 10 mg vial in a 5/5 ratio (two equal parts) holds 5 mg of each. A 10 mg vial in a 10/10/2 ratio holds 4.5455 mg, 4.5455 mg and 0.9091 mg respectively — the parts are proportional to the ratio, not to the count of components.
peptide blend calculator ratio
This page's calculator takes a blend's total mg, its published ratio (as printed on the vial — 5/5, 10/10/2, 2:1, and similar shapes all work), a water volume and a draw volume, and returns each component's amount in the vial and in that draw, plus the draw's reading on a U-100 syringe.
Why does the calculator need the ratio? Can't it just split evenly?
An even split is an assumption, and a wrong one whenever a blend's components aren't in equal parts — which many aren't. This calculator reads the ratio the vendor actually publishes rather than guessing one, the same way Prof. Peptide's own price data refuses to assume a blend's component split when the vendor hasn't stated it. A blend with no published ratio cannot be broken into components here; there is nothing to divide by.
How do I read a blend ratio like 5/5 or 10/10/2?
Each number is that component's share of the vial's total mg, in the order the vendor lists them. 5/5 means two components in equal parts. 10/10/2 means three components, with the first two each getting five times the third's share. The calculator accepts slashes, colons or spaces between the numbers.
What does the draw volume represent in a blend?
The amount of reconstituted liquid pulled into the syringe for one administration — every component present in the vial is present in that draw, in the same proportion as the whole vial, since the components are mixed together in solution rather than layered separately.

For a single-compound vial’s reconstitution arithmetic, see the general peptide dosage calculator.