Common vial sizes and water amounts
| Vial | Water | What that gives you |
|---|---|---|
| 10 mg | 1 mL | 10 mg/mL; 1 mg = 10U |
| 10 mg | 2 mL | 5 mg/mL; 1 mg = 20U |
| 30 mg | 3 mL | 10 mg/mL; 2.5 mg = 25U |
| 60 mg | 3 mL | 20 mg/mL; 5 mg = 25U |
Worked examples
Concentration 5 mg/mL → 50 mcg per unit → draw 20 units (0.2 mL) on a 30U syringe. That vial holds about 10 such draws.
Concentration 10 mg/mL → 100 mcg per unit → draw 25 units (0.25 mL) on a 30U syringe. That vial holds about 12 such draws.
Concentration 20 mg/mL → 200 mcg per unit → draw 25 units (0.25 mL) on a 30U syringe. That vial holds about 12 such draws.
Notes for this calculator
1 mg is 1,000 mcg. The unit toggle next to the dose box converts on the fly, so a 0.5 mg entry and a 500 mcg entry give the same answer. Everything else on the page is unchanged.
Milligram entries drain a vial faster than microgram ones, so watch doses per vial and cost per draw on the result card.
Vials for this calculator: see what ThePeptideStore carries. Supplies around the vial are in the kit above.
Common questions
How do I convert a mg peptide dose to syringe units?
Units = dose mg divided by concentration (mg/mL), times 100. Example: 10 mg in 2 mL is 5 mg/mL; a 1 mg entry is 1 divided by 5 times 100 = 20 units.
How many mcg are in 1 mg?
1,000 mcg. 0.25 mg is 250 mcg, 2.5 mg is 2,500 mcg.
Which syringe for mg doses?
Larger entries need larger syringes. If the draw is over 30 units the calculator suggests a 50U or 100U.
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.