peptide reconstitution calculator
full vial math, made readable. match the amount and unit printed on the vial, enter the water volume, then convert your own target research amount to ml and a u-100 barrel reading. use mg or mcg for mass-labeled vials and preserve IU or USP units for activity-labeled vials. compare several values at the same concentration without turning them into a schedule or suggested protocol.
how to use the concentration calculator
- match the vial label. enter the number printed on the vial and select its actual unit: mg, IU, or USP units. the calculator never treats activity units as mass.
- enter the water volume. record the bacteriostatic water volume in milliliters. the concentration and every converted result update from this value.
- enter your research amount. use mg or mcg for a mass-labeled vial. an activity-labeled vial keeps the same IU or USP label throughout the calculation.
- read the conversion. the calculator shows concentration, milliliters, and the matching position on a u-100 barrel, where 100 units equals 1 ml.
- compare without changing the setup. open the optional batch view to convert several values at the same concentration. every value is entered by you; the tool does not create a schedule or protocol.
worked examples on a u-100 syringe
| vial amount | water | concentration | amount in one mark (0.01 ml) |
|---|---|---|---|
| 2 mg | 1 ml | 2 mg/ml | 20 mcg |
| 5 mg | 2 ml | 2.5 mg/ml | 25 mcg |
| 10 mg | 2 ml | 5 mg/ml | 50 mcg |
| 10 mg | 5 ml | 2 mg/ml | 20 mcg |
| 10 IU | 1 ml | 10 IU/ml | 0.1 IU |
syringe units are volume marks. a u-40 syringe marks 40 units per ml, so the same mark holds 2.5 times the volume.
water only sets the strength. the bac water volume changes the concentration and never changes how much peptide is in the vial.
syringe units, IU and USP units
this calculator keeps IU and USP labels as printed and never converts them to mg or to each other. there is no universal IU to mg ratio; where one exists, a reference standard sets it for that substance.
syringe units measure volume; IU and USP units measure activity. an FDA alert of july 26, 2024 says confusion between ml, mg and syringe units may have contributed to dosing errors.
frequently asked questions
what is peptide reconstitution?
reconstitution is mixing a dry peptide powder with a sterile liquid, commonly bacteriostatic water, to make a solution of a known strength. this calculator does the concentration math: mass in, water in, strength out.
what units does the calculator support?
mass-labeled vials can use mg with target research amounts entered in mg or mcg. activity-labeled vials can use IU or USP units. the calculator preserves the selected activity label instead of pretending it can convert activity into mass.
what changes when i enter a different water volume?
the concentration changes, so the milliliter result and u-100 reading change too. the labeled vial amount and your entered research amount remain exactly what you set.
does the calculator recommend a research protocol?
no. it performs generic concentration conversion from values you enter. it contains no compound-specific amounts or schedules and is not medical advice or an instruction for personal use.
related peptides
BPC-157 · TB-500 · tirzepatide · semaglutide · retatrutide · ipamorelin
concentration-matching math for research record-keeping only. not an injection instruction, not medical advice. peptides referenced are research-use-only.