Peptide Reconstitution Calculator
Calculate concentration, syringe units per dose, and estimated number of doses from one vial.
Educational tool only. Always follow licensed medical guidance, product labeling, and sterile technique.
What this peptide calculator helps you do
A peptide vial and a syringe scale can be confusing if you are doing the math manually every time. This calculator gives you the practical numbers most people need:
- Concentration after reconstitution (mcg per mL)
- How many syringe units to draw for your target dose
- Total estimated doses available from the vial
- Estimated days of supply based on your dose frequency
It works for any peptide amount, any reconstitution volume, and common syringe scales (such as U-100).
How the math works
1) Convert mg in the vial to mcg
Since 1 mg = 1,000 mcg, a 5 mg vial contains 5,000 mcg total peptide.
2) Find concentration
Concentration is total mcg divided by total mL:
concentration (mcg/mL) = total peptide (mcg) / diluent (mL)
3) Convert desired dose to syringe units
If you know your concentration and syringe scale:
mcg per unit = concentration (mcg/mL) / syringe units per mL
units to draw = target dose (mcg) / mcg per unit
Quick example
Suppose your vial has 5 mg peptide and you add 2 mL diluent.
- Total peptide = 5,000 mcg
- Concentration = 5,000 / 2 = 2,500 mcg/mL
- On a U-100 syringe, each unit = 2,500 / 100 = 25 mcg
- A 250 mcg dose = 250 / 25 = 10 units
That means drawing to the 10-unit mark gives 250 mcg in this setup.
How to pick a reconstitution volume
People often choose a volume that makes syringe math simple. A practical approach is to choose a dilution where common doses map to clean unit marks.
- If you want smaller unit draws, use a higher concentration (less diluent).
- If you want finer control and larger draw volumes, use a lower concentration (more diluent).
- Keep injections within comfortable and safe volume ranges advised by your clinician.
Common mistakes this calculator helps prevent
Mixing up mg and mcg
This is the most frequent error. A 10x or 100x dosing mistake can happen quickly if units are mixed. Always confirm the conversion first.
Ignoring syringe type
“Units” are not universal across all syringes. U-100, U-40, and other scales translate differently to mL. Always match your calculator setting to your actual syringe.
Not recalculating after changing diluent volume
If you add a different amount of bacteriostatic water, concentration changes immediately. Recalculate every time.
FAQ
Can I use this for any peptide?
It is a math tool, so yes for concentration and dose conversion. But it does not provide medical dosing advice, treatment recommendations, or safety approval.
Does this calculator replace medical guidance?
No. It only performs arithmetic based on your inputs. Dosing decisions should come from a qualified clinician.
Why show both mL and units?
mL helps with universal concentration math, while units help with practical syringe drawing.
Final thoughts
A peptide protocol is much easier to follow when your reconstitution math is clear. Use this calculator to reduce manual errors, document your setup, and keep your dosing process consistent.
Double-check your vial label, diluent amount, syringe type, and target dose each time before drawing.