Reconstitute any peptide with bacteriostatic water and know exactly how many units to draw on your insulin syringe. Enter your vial size, water volume, and desired dose — the calculator does the rest.
Reconstitution math is straightforward once you know the formula. The calculator above handles it for you, but here's what's happening behind the scenes:
Step 1. Convert your vial from milligrams to micrograms (multiply by 1,000), then divide by the amount of bacteriostatic water you added. This gives you the concentration in mcg per mL.
Step 2. Divide your desired dose (in mcg) by the concentration. This gives you the volume to inject in milliliters.
Step 3. On a standard U-100 insulin syringe, 1 mL equals 100 units. Multiply your volume by 100 to get the number of units (tick marks) to draw.
For a complete walkthrough of the reconstitution process including equipment, sterile technique, and storage, see our full reconstitution guide. If you're new to peptides entirely, start with our beginner's guide.
These are the most frequently reconstituted peptides. Each example uses standard vial sizes and common bacteriostatic water volumes so you can follow along with the calculator above.
A BPC-157 vial is typically 5 mg. Add 2 mL of bacteriostatic water. That gives you a concentration of 2,500 mcg/mL, or 25 mcg per unit. For a standard 250 mcg dose, draw 10 units on your insulin syringe. The vial will last 20 doses.
TB-500 is commonly dosed higher than most peptides. With a 5 mg vial and 2 mL of BAC water, the concentration is 2,500 mcg/mL (25 mcg per unit). For a 2,500 mcg (2.5 mg) loading dose, draw 50 units — exactly half the syringe. That's 2 doses per vial. Many people use TB-500 alongside BPC-157 for injury recovery.
CJC-1295 and ipamorelin are often stacked for growth hormone release. CJC-1295 typically comes in 2 mg vials — add 2 mL of BAC water for a concentration of 1,000 mcg/mL (10 mcg per unit). For 100 mcg, draw 10 units. Ipamorelin comes in 5 mg vials — with 2 mL of BAC water that's 2,500 mcg/mL (25 mcg per unit). For 100 mcg, draw 4 units.
GHK-Cu vials are typically 10 mg. Add 2 mL of BAC water for a concentration of 5,000 mcg/mL (50 mcg per unit). For a 500 mcg dose, draw 10 units. The vial will last 20 doses. GHK-Cu is also being studied for hair loss.
Compounded semaglutide (the peptide behind GLP-1 weight loss drugs) commonly comes in 5 mg vials. With 2 mL of BAC water, the concentration is 2,500 mcg/mL (25 mcg per unit). For a 250 mcg starting dose, draw 10 units. The vial provides 20 doses at this level.
Common peptides at standard reconstitution volumes with typical doses. All values assume a U-100 insulin syringe.
| Peptide | Vial | BAC Water | Dose | Draw |
|---|---|---|---|---|
| BPC-157 | 5 mg | 2 mL | 250 mcg | 10 units |
| BPC-157 | 5 mg | 2 mL | 500 mcg | 20 units |
| TB-500 | 5 mg | 2 mL | 750 mcg | 15 units |
| TB-500 | 5 mg | 2 mL | 2,500 mcg | 50 units |
| CJC-1295 | 2 mg | 2 mL | 100 mcg | 10 units |
| Ipamorelin | 5 mg | 2 mL | 100 mcg | 4 units |
| Ipamorelin | 5 mg | 2 mL | 200 mcg | 8 units |
| GHK-Cu | 10 mg | 2 mL | 100 mcg | 2 units |
| GHK-Cu | 10 mg | 2 mL | 500 mcg | 10 units |
| Epithalon | 10 mg | 3 mL | 300 mcg | 9 units |
| Semaglutide | 5 mg | 2 mL | 250 mcg | 10 units |
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