Peptide Reconstitution Calculator
Arithmetic only: concentration, draw volume and U-100 syringe units from values you supply.
Your answer
Appears here as you enter your details. No demo figures — the number is yours, or it is nothing.
Methodology
Three lines of arithmetic, nothing more:
concentration (mg/ml) = vial contents (mg) ÷ diluent added (ml)
draw volume (ml) = prescribed dose (mg) ÷ concentration
U-100 syringe units = draw volume (ml) × 100
Doses entered in micrograms are converted to milligrams (÷1000) before the division. The tool holds no compound database, no preset doses and no recommendations. Every number comes from you, and should come to you from a prescriber.
Interpreting your result
The syringe-units figure is where mistakes are cheapest to catch: U-100 markings measure volume, so the same "10 units" contains completely different drug amounts at different concentrations. Whenever you change the diluent volume, the concentration, and therefore the draw for the same dose, changes with it. Re-run the arithmetic after any change, and cross-check against your prescriber's instructions before drawing.
If the tool reports that your dose needs more volume than the vial holds, the usual culprit is a units mix-up (mg entered as mcg or vice versa).
Limitations
- Arithmetic assumes complete, uniform dissolution and no overfill; actual vial contents can vary slightly from the label.
- This page cannot verify that your entered values are correct or safe. It multiplies and divides exactly what you type.
- Sterile technique, storage and administration are entirely outside this tool's scope; your pharmacist is the right source for all three.
Sources
Frequently asked questions
- How do I calculate peptide reconstitution?
- Concentration = vial contents (mg) ÷ diluent added (ml). Draw volume = your prescribed dose ÷ that concentration, and a U-100 syringe reads 100 units per ml. This tool performs exactly that arithmetic on numbers you supply.
- Why doesn't this tool suggest doses?
- Deliberately. Dosing belongs to your prescriber, so the calculator carries no compound presets and no dose suggestions, and only converts values you already have into volumes and syringe units.
- What is a U-100 syringe?
- A syringe calibrated so that 100 units equal 1 ml. The unit markings measure volume, not drug amount, so the same unit count contains different amounts depending on your concentration, which is why this arithmetic matters.
- Does the diluent amount change the dose?
- No, it changes the concentration, and therefore the volume you draw for the same dose. More diluent means larger, easier-to-measure draw volumes; the drug amount per dose stays whatever your prescriber set.