Peptide Mixing Calculator
This peptide mixing calculator works out what one draw actually delivers when a vial holds more than one compound. Enter each compound and its amount, the water in the shared vial, and a dose for one of them. You get the draw in units, plus what that same draw carries of every other compound in the vial.
That one draw () delivers:
Units measure volume, not dose. In a shared vial, every draw carries every compound in it.
The link holds only the numbers you typed. No account, no tracking, nothing else.
On this page
How this peptide mixing calculator works
A blend vial breaks the one shortcut a normal calculator relies on. With a single compound, one concentration describes the whole vial. With two or more compounds sharing the same water, each compound has its own concentration, because each one went in at its own amount.
So the maths runs per compound. Each amount is divided by the shared water to get that compound's concentration. The draw is sized by the compound you pick: your dose divided by its concentration. Then that same draw is multiplied by every other concentration, one by one, which is how the result can tell you exactly what else you are drawing up. Skip that last step and the other compounds ride along uncounted.
A worked blend example
Take a vial with 5 mg of BPC-157 and 10 mg of TB-500 in one powder, mixed with 2 mL of water. The concentrations are different even though the water is shared: BPC-157 sits at 2,500 mcg per mL, TB-500 at 5,000 mcg per mL, because there is twice as much of it in the vial.
Say the dose you are working out is 250 mcg of BPC-157. Divide it by the BPC-157 concentration and the draw is 0.1 mL, which is 10 units. That draw also pulls 500 mcg of TB-500 with it, because the draw is filled with the stronger TB-500 concentration too. Double the BPC-157 dose and both numbers double. The amounts in this example are there to show the maths. They are not suggestions.
| BPC-157 dose (mcg) | Draw (units) | TB-500 in the same draw (mcg) |
|---|---|---|
| 250 | 10 | 500 |
| 500 | 20 | 1,000 |
| 750 | 30 | 1,500 |
| 1000 | 40 | 2,000 |
Read the third column slowly. Every row delivers twice as much TB-500 as BPC-157, because the vial holds twice as much. Anyone who only checks the first two columns thinks they are taking the dose in column one. They are taking column three as well.
Three compounds: a GLOW style vial
Nothing changes with three compounds except that there are three concentrations to keep track of, which is exactly where doing this by hand starts to slip. A GLOW style vial combines BPC-157, TB-500 and GHK-Cu. Say a vial holds 10 mg of BPC-157, 10 mg of TB-500 and 50 mg of GHK-Cu, mixed with 3 mL of water, and the dose being worked out is 300 mcg of BPC-157.
| Draw for 300 mcg of BPC-157 | TB-500 it delivers | GHK-Cu it delivers |
|---|---|---|
| 9 units | 300 mcg | 1.5 mg |
The GHK-Cu number is the one that surprises people. It went into the vial at five times the amount of the other two, so it comes out of every draw at five times the rate. KLOW vials add a fourth compound, KPV, and the calculator above takes a fourth row for the same reason.
The ratio in a blend vial is fixed
This is the limitation nobody mentions on the product pages. Once compounds share a vial, their ratio is locked. Every draw takes them in the exact proportion they were mixed in, so there is no draw that gives you more of one and less of another. Want twice the BPC-157? You get twice the TB-500 in the same motion, whether you wanted it or not.
It is also why a blend vial and separate vials are not interchangeable arrangements of the same thing. Separate vials let each amount move on its own. A blend trades that freedom for having everything in one draw, and the calculator's job is to make sure the trade is at least visible in numbers before the syringe is filled.
Blend vial or two separate vials?
The searches for this page mix two different setups, so it is worth separating them. A blend vial arrives with the compounds already combined in one powder. That is what this calculator is for, and the per-compound amounts come off the label.
Two separate vials are the other setup. Each vial has one compound and its own concentration, nothing is shared, and each draw is a plain standard calculation. Use the peptide calculator once per vial. The fixed-ratio problem above does not apply, because nothing was ever locked together.
Common questions
How do I work out a dose from a blend vial?
In three steps. First, each compound gets its own concentration: its amount in the vial divided by the shared water. Second, pick the dose you want for one compound and divide it by that compound’s concentration to get the draw. Third, multiply the draw by every other compound’s concentration to see what else it delivers. The calculator above does all three steps at once.
Can I take more of one compound without more of the others?
Not from a shared vial. The ratio between the compounds is set when the vial is mixed, and a bigger draw scales every compound up together, in the same proportion. If the amounts need to move independently, the compounds have to live in separate vials, and then each one is a standard calculation on its own.
What is the difference between a peptide mixing calculator and a normal peptide calculator?
A normal calculator assumes one compound in the vial, so one concentration explains the whole draw. A mixing calculator handles two, three or four compounds sharing one vial, keeps a separate concentration for each, and reports what a draw delivers of all of them, not just the one you aimed at.
What are GLOW and KLOW blends?
They are names for set combinations sold as a single vial. GLOW combines BPC-157, TB-500 and GHK-Cu. KLOW is the same three plus KPV. The names tell you the ingredients, not the amounts, so read the amounts off your own vial label and enter those. The maths is the same as any other blend.
Can I mix two peptides from separate vials in one syringe?
That is a different situation from a blend vial, and the maths is simpler: each vial keeps its own concentration, so work out each draw separately with the standard peptide calculator. Whether two compounds should share a syringe at all is not a maths question, and it is not one this site can answer. This page only does arithmetic.
My blend vial only lists a total amount, not each compound. Can I still calculate it?
No, and be wary of any tool that says otherwise. The maths needs each compound’s own amount. A label that just says “10 mg blend” leaves the split between compounds unknown, and a calculator that guesses the split would be inventing your numbers.
Arithmetic only
This calculator does maths on the numbers you enter. It works out concentration, draw volume and syringe units from the vial amount and water volume you give it. Nothing more.
It does not recommend amounts, schedules or products, and it does not know what is in your vial. It uses the amount printed on the label. If the label and the actual contents differ, the result differs too. For medical questions, talk to a clinician.
How the maths works, and where the facts on this site come from: Methodology and sources.