Peptide Reconstitution Dosage Calculator
Use this tool to convert vial strength and reconstitution volume into a draw amount in mL and insulin syringe units (U-100).
Assumes a U-100 insulin syringe where 100 units = 1 mL.
How this peptide dosage calculator works
This calculator is built for one job: helping you convert concentration into a practical draw volume. When people mix peptides, they usually know three things:
- How much peptide is in the vial (for example, 5 mg)
- How much diluent they added (for example, 2 mL bacteriostatic water)
- The target dose they want to measure out (for example, 250 mcg)
From those inputs, the calculator computes concentration, then tells you exactly how many mL (and insulin units) correspond to your target amount.
Formulas used in the calculator
1) Concentration
Concentration (mg/mL) = Total peptide (mg) ÷ Diluent volume (mL)
2) Unit conversion
If your desired dose is entered in micrograms:
Desired dose (mg) = Desired dose (mcg) ÷ 1000
3) Injection volume
Volume to draw (mL) = Desired dose (mg) ÷ Concentration (mg/mL)
4) Syringe units
For U-100 insulin syringes:
Units = mL × 100
Quick reference examples
| Vial | Diluent | Target Dose | Draw (mL) | Draw (U-100 units) |
|---|---|---|---|---|
| 5 mg | 2 mL | 250 mcg | 0.10 mL | 10 units |
| 10 mg | 4 mL | 500 mcg | 0.20 mL | 20 units |
| 2 mg | 1 mL | 200 mcg | 0.10 mL | 10 units |
Step-by-step usage
- Enter the total peptide amount listed on your vial in mg.
- Enter total diluent volume you reconstituted with in mL.
- Enter your target dose value and select mcg or mg.
- Click Calculate to get draw volume, syringe units, and doses per vial.
Common mistakes to avoid
Mixing up mg and mcg
This is the most common error. Remember: 1 mg = 1000 mcg. A misplaced unit can create a 1000x calculation error.
Using the wrong syringe scale
This calculator reports insulin units based on U-100 markings. If you use another syringe type, convert carefully.
Ignoring final reconstitution volume
Your concentration depends on the actual total liquid in the vial. Always track what you added.
Practical interpretation of results
- Concentration: Helps you compare different reconstitution strategies.
- Draw volume (mL): The physical volume corresponding to one target dose.
- Insulin units: Convenient readout for U-100 syringe markings.
- Doses per vial: Approximate number of doses at your selected amount.
Frequently asked questions
Can I use this for any peptide?
Yes, mathematically. The calculator is concentration-based and not peptide-specific.
Does this tell me what dose I should take?
No. It does not provide a recommendation—only measurement conversion.
Why does the calculator reject my input?
Values must be positive numbers, and the desired dose cannot exceed total peptide in the vial.
Final note
A peptide dosage calculator is best used as a precision tool, not a protocol tool. Keep your units consistent, verify every number before drawing, and consult a licensed clinician for any real-world treatment decisions.