You need three numbers: mg in the vial, mL after mixing, and the dose you want to calculate. This is a math example, not a mixing recipe or suggested dose.
1. Work out how much is in each mL
Suppose a vial contains 10 mg and the mixed liquid totals 2 mL.
10 mg ÷ 2 mL = 5 mg per mL.
This is called concentration: how much peptide is in each mL of liquid.
2. Work out the liquid for your entered dose
Suppose you enter 0.5 mg. Divide that by the concentration:
0.5 mg ÷ 5 mg per mL = 0.1 mL.
If you enter 500 mcg instead, that is the same amount: 500 mcg = 0.5 mg.
3. Read the U-100 syringe marks
On a U-100 syringe, 100 units = 1 mL. So 0.1 mL = 10 units. The marks measure liquid, not milligrams. Changing the amount of water changes how many mg those same marks represent.
Two things to check
- Liquid volume: the calculator assumes the liquid you enter equals the total after mixing. If you know the measured total, use it.
- Vial amount: a label states an amount; a matching lab report may measure a different amount. JD BioWorks’ COA guide explains that difference.
Try the calculator or visual walkthrough.
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