How to use the Peptide Reconstitution Calculator
- Enter your peptide vial size in milligrams (e.g., 5mg, 10mg).
- Enter the volume of bacteriostatic (BAC) water you will add in milliliters (e.g., 2ml).
- Enter your desired dose in micrograms (mcg).
- Select your syringe size (100 units = 1ml, 50 units = 0.5ml, or 30 units = 0.3ml).
- Read the result: the calculator shows exactly how many units to draw for your dose.
Understanding Peptide Dosage & BAC Water Ratio
The math is simple: Concentration (mcg per unit) = (Peptide mg × 1000) ÷ (BAC Water ml × 100). One milliliter equals 100 insulin units.
Example: 5mg peptide in 2ml BAC water = 5000mcg ÷ 200 units = 25 mcg/unit. For 250mcg, pull 10 units.
More BAC water = lower concentration = more units per dose. Less BAC water = higher concentration = fewer units.
Peptide Reconstitution Chart
| Peptide | BAC Water | Concentration | 250mcg = | 500mcg = |
|---|---|---|---|---|
| 5mg | 2ml | 25 mcg/unit | 10 units | 20 units |
| 5mg | 2.5ml | 20 mcg/unit | 12.5 units | 25 units |
| 10mg | 2ml | 50 mcg/unit | 5 units | 10 units |
| 10mg | 5ml | 20 mcg/unit | 12.5 units | 25 units |
| 2mg | 1ml | 20 mcg/unit | 12.5 units | 25 units |
Storage and Safety Tips
Reconstituted peptides should be refrigerated (2–8°C / 36–46°F). Avoid freezing.
BAC water typically has a 28–30 day shelf life after opening. Check the manufacturer label.
Keep vials away from light. Use within the recommended timeframe for your peptide.
Frequently Asked Questions
- How do I calculate 250mcg of BPC-157?
- Enter your vial size (e.g., 5mg), BAC water volume (e.g., 2ml), and 250 as the desired dose. The calculator shows the exact units to pull. For 5mg in 2ml, 250mcg = 10 units.
- What is the best BAC water ratio?
- Common ratios are 2–3ml per 5mg vial. More water gives lower concentration and easier dosing; less water gives higher concentration. Choose based on your syringe size and dose.
- How many units are in a 1ml syringe?
- A 1ml (100 unit) insulin syringe has 100 units. A 0.5ml syringe has 50 units, and a 0.3ml syringe has 30 units.
- Is this peptide calculator accurate for all peptides?
- Yes. The formula applies to any peptide: concentration = total mcg ÷ total units. It works for BPC-157, Tirzepatide, Semaglutide, and others.