Peptide Blend Calculator

The math

Read the label

Start with the label. If it lists each component, enter each one as its own mg amount. If it lists one total with a ratio, split that total by the ratio shown on your label so each component has its own mg amount.

Split the blend

Now use the liquid amount. Each component's mg divided by the mL of liquid gives that component's mg per mL. The example below shows the same setup with numbers filled in.

Use the liquid amount

From there, the drawn amount sets the share of each component. The calculator uses the syringe units you enter to show the mL drawn and how much of each component is in that draw. You can see every line of the work under the answer.

Per component or total? The most common mix-up

This is where most labels slow people down. Some show Component A and Component B as separate amounts. Others show one total and a ratio. The key is to treat each component separately before you look at the draw.

That matters because mg, mL, and units are different things. The FDA alert on dosing errors with compounded injectables (opens in a new tab) says confusion between milliliters, milligrams, and units is part of the problem. Here, the tool shows each step so you can compare it with your label.

If the wording on your vial is hard to parse, this short guide can help. See how to read a vial label to sort out per-component numbers from one total.

What one unit holds

The table below breaks the draw into what each unit contains for each component. Read it as a lookup, not a rule for every syringe.

For insulin-style units, MedlinePlus: Giving an insulin injection (opens in a new tab) says standard insulin contains 100 units in 1 mL. ADA: Overview of Insulin Concentration for School Nurses (opens in a new tab) says the syringe must match the vial's concentration. Count the lines on your own barrel, and read the draw by lining up the plunger tip with the line.

If you want a quick side-by-side reference while you compare labels, the reconstitution chart is a handy companion to the table.

After the math

Once the numbers look right, you can Save as a vial to keep the blend together as one vial with its components. If you want paper on the counter, Print result is there in the tool. You can also keep notes in the peptide tracker.

If the answer is larger than your syringe can hold, that draw won't fit on that barrel. For anything beyond the arithmetic or reading the marks, follow the label and ask your pharmacist or prescriber.