Peptide Dosage Calculator
Enter your vial size, BAC water volume, and desired dose to calculate exact injection amounts in mL and insulin syringe units.
How to Use This Calculator
This calculator helps you determine exactly how much reconstituted peptide solution to draw into your syringe for a specific dose. Here is how to use it:
- Enter your vial size in milligrams. This is the total amount of peptide powder in your vial (printed on the label). Common sizes are 2mg, 5mg, and 10mg.
- Enter the BAC water volume you added (or plan to add) to the vial in milliliters. Common amounts are 1mL, 2mL, or 3mL of bacteriostatic water.
- Enter your desired dose in micrograms (mcg). This is the amount your provider prescribed. For example, 250mcg, 500mcg, or 2,000mcg.
- Read your results. The calculator shows the concentration of your reconstituted solution, the volume to inject in mL, and the equivalent number of units on a standard 100-unit insulin syringe.
One unit on a 100-unit insulin syringe equals 0.01mL. So 10 units equals 0.1mL, 20 units equals 0.2mL, and so on. This is the most common syringe type used for subcutaneous peptide injections.
Common Peptide Reconstitution Ratios
The table below shows standard reconstitution ratios for common vial sizes. The amount of BAC water you add determines your solution concentration, which in turn determines how much liquid you draw up per dose.
| Vial Size | BAC Water | Concentration |
|---|---|---|
| 2 mg | 1 mL | 2,000 mcg/mL |
| 2 mg | 2 mL | 1,000 mcg/mL |
| 5 mg | 1 mL | 5,000 mcg/mL |
| 5 mg | 2 mL | 2,500 mcg/mL |
| 5 mg | 2.5 mL | 2,000 mcg/mL |
| 10 mg | 2 mL | 5,000 mcg/mL |
| 10 mg | 3 mL | 3,333 mcg/mL |
| 10 mg | 5 mL | 2,000 mcg/mL |
Peptide Dosage Quick Reference
The following table lists commonly used peptides with their typical dose ranges and standard vial sizes. These are general reference ranges from clinical practice and published research. Your specific dose should be determined by your healthcare provider.
| Peptide | Typical Dose | Common Vial Size |
|---|---|---|
| BPC-157 | 250-500 mcg | 5 mg |
| TB-500 | 2,000-2,500 mcg | 5 mg |
| CJC-1295 (no DAC) | 100-300 mcg | 2 mg |
| Ipamorelin | 100-300 mcg | 5 mg |
| Tesamorelin | 2,000 mcg | 2 mg |
| AOD-9604 | 300-600 mcg | 5 mg |
| KPV | 200-500 mcg | 5 mg |
| GHK-Cu | 200-600 mcg | 5 mg |
| Sermorelin | 200-500 mcg | 3 mg |
| PT-141 | 500-2,000 mcg | 10 mg |
Frequently Asked Questions
How do I convert mg to mcg for peptide dosing?
Multiply milligrams by 1,000 to get micrograms. For example, 5mg equals 5,000mcg. Most vials are labeled in mg while doses are typically expressed in mcg.
What size syringe should I use for peptide injections?
A 1mL (100-unit) insulin syringe with a 29 to 31 gauge needle is standard for subcutaneous peptide injections. The fine gauge makes injections virtually painless. Use a half-inch needle length for subcutaneous delivery.
How many doses can I get from one vial?
Divide the total vial contents (in mcg) by your dose (in mcg). For example, a 5mg vial contains 5,000mcg. At 250mcg per dose, that is 20 doses per vial. At 500mcg per dose, that is 10 doses per vial.
Does it matter how much BAC water I add?
The amount of water changes the concentration but not the total amount of peptide. More water means a lower concentration and larger injection volume per dose. Less water means higher concentration and smaller volume. Use enough water to make your doses easy to measure on your syringe.
How long does reconstituted peptide last?
Most reconstituted peptides last 21 to 28 days when stored properly in the refrigerator at 2 to 8 degrees Celsius. Do not freeze reconstituted peptides. Use bacteriostatic water (not sterile water) for multi-dose vials, as the benzyl alcohol preservative prevents bacterial growth.
Need Help with Peptide Therapy?
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Medical Disclaimer: This calculator is for informational and educational purposes only. It does not constitute medical advice. Peptide dosing should be determined by a licensed healthcare provider based on your individual health status, lab results, and treatment goals. Always follow the specific instructions provided by your prescribing clinician and compounding pharmacy. Do not self-prescribe or self-administer peptides without medical supervision.