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Peptide Blend Calculator

A blend vial has one total mass split between peptides in a fixed ratio. Calculate on the total; the ratio rides along in every unit. Below: how to read the label and split the numbers.

Peptide5 mg
Water2 mL
Dose250 mcg
Syringe30U
Draw10U

Peptide in the vial

5 mg
mg

Bacteriostatic water added

2 mL
mL

More water = more units per dose (easier to measure). Less water = fewer units (fits smaller syringes).

Syringe

30U · 0.3 mL

Check the last printed number on your barrel: 30, 50 or 100. That is the capacity.

Dose you want

250 mcg

Vial price (optional)

–
$shows cost per dose

Supplies for your next vial

Everything around the vial, in one box, from the same people who built this calculator.

Reconstitution Supply Kit

  • 10 U-100 insulin syringes, 31G, 5/16" needle (the 30U size this calculator defaults to)
  • 50 sterile 70% isopropyl alcohol prep pads
  • 1-quart sharps container so used needles never go in the trash
  • Printed reconstitution and storage card

Does not include bacteriostatic water or peptides. Research and laboratory use. Must be 18+ to purchase. Not shipped to states that restrict non-prescription syringe sales.

$24.95 free US shipping · ships in 3 to 5 days
Reserve a kit (email, pay when it ships) Online checkout opens shortly. Reservations are first in line and there is no charge until the kit ships.

Common vial sizes and water amounts

VialWaterWhat that gives you
10 mg2 mL1:1 blend: each unit has 25 mcg of each
20 mg2 mL1:1 blend: each unit has 50 mcg of each
70 mg3 mL3-part blend: units carry the label ratio
80 mg4 mL3-part blend: 200 mcg per unit total

Worked examples

10 mg vial + 2 mL water, entering 500 mcg
Concentration 5 mg/mL → 50 mcg per unit → draw 10 units (0.1 mL) on a 30U syringe. That vial holds about 20 such draws.
20 mg vial + 2 mL water, entering 1 mg
Concentration 10 mg/mL → 100 mcg per unit → draw 10 units (0.1 mL) on a 30U syringe. That vial holds about 20 such draws.
70 mg vial + 3 mL water, entering 2 mg
Concentration 23.3 mg/mL → 233 mcg per unit → draw 8.57 units (0.0857 mL) on a 30U syringe. That vial holds about 35 such draws.

Notes for this calculator

To find how much of one peptide is in a draw: take the draw's total mcg and multiply by that peptide's share of the label. A 500 mcg draw from a 10 mg vial labeled 5 mg BPC-157 + 5 mg TB-500 contains 250 mcg of each. From a 70 mg vial labeled 50 mg GHK-Cu + 10 mg BPC-157 + 10 mg TB-500, a 2 mg draw is 1.43 mg GHK-Cu and 0.29 mg of each of the others.

The calculator never needs the split; it works on the total. The split only matters when you want to know what one component in the draw comes to.

Vials for this calculator: see what ThePeptideStore carries. Supplies around the vial are in the kit above.

Common questions

How do you dose a peptide blend?

Calculate on the vial's total mg exactly like a single peptide. The ratio between the peptides is fixed inside the vial, so every unit carries the same proportions.

How much of each peptide is in one unit of a blend?

Multiply the mcg per unit by each peptide's share of the total. A 10 mg 1:1 blend in 2 mL is 50 mcg per unit, so 25 mcg of each.

Can I calculate a blend I mix myself from two vials?

Yes, if you dissolve both in the same water: add the two masses for the total mg and use the total water. Keep the vial capacity in mind.

Does the calculator recommend a dose?

No. You enter the dose your protocol calls for and it converts that into syringe units, mL, and doses per vial. It never suggests what to take.

Why is my draw too big for the syringe?

The concentration is low for that dose. Either use a larger U-100 syringe or mix the next vial with less water. The calculator shows the exact water amount that would fit your syringe.

More calculators and guides

About this tool. Built and maintained by the team at ThePeptideStore. The arithmetic is the standard U-100 reconstitution formula (concentration = mg ÷ mL; mcg per unit = concentration × 10; units = dose ÷ mcg per unit) and every result is recomputed live in your browser; nothing you enter is sent to a server. Reviewed 2026-09-02. This calculator does arithmetic on numbers you type. It is not medical advice and does not recommend any dose.
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