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USA Domestic Delivery and Same-Day Shipping
USA Domestic Delivery and Same-Day Shipping

How Much Bacteriostatic Water Add to Peptides?

Use our calculator below to find out exactly how much bacteriostatic water you need based on your peptide dose and desired concentration.
💧 BAC Water Calculator
Let's find the perfect amount of BAC water for your reconstitution!
Select Your Vial Size
Choose Your Dose
Your Perfect BAC Water Amount Is
0 mL

Set Your Dose

Begin by selecting the amount of peptide you plan to inject per dose. This is a crucial step because it determines how much of the final solution you’ll need for each injection. You’ll enter this amount in micrograms (mcg).

Once your desired dose is entered, the calculator will automatically calculate how much of the reconstituted peptide solution you’ll need to draw per injection. This ensures that your dosing is accurate and consistent every time.

Enter Your Peptide Strength

For small, daily doses requiring frequent injections, 1 mL or less of bacteriostatic water is usually sufficient, allowing for accurate micro-dosing.
For most standard peptide protocols (around 20 doses per vial), 2 to 3 mL of bacteriostatic water is commonly used. This dilution works well for:

  • BPC-157
  • Ipamorelin
  • TB-500
  • CJC-1295
  • GHK-Cu
  • Other similar peptides

For GLP-1 peptides like Semaglutide and Tirzepatide, which are highly potent and used in very small amounts, 0.5 to 1 mL of bacteriostatic water is typically enough for proper dilution.

Add Your Water Volume

When reconstituting peptides, both under-dilution and over-dilution can cause issues. Understanding these risks helps ensure safe and accurate dosing.

Problems with too little water:

  • The solution is highly concentrated, making precise dosing more difficult.
  • Small measurement errors can lead to significant dosing mistakes.

Problems with too much water:

  • The solution becomes too diluted, requiring larger injection volumes.
  • Higher chance of wasting the product if the vial expires before use.
Close-up of a 30mL bacteriostatic water vial and a syringe on a white background

Ready to Calculate Your Dose?

Use our Peptide Dosage Calculator to get accurate and consistent injection measurements based on your selected dose, peptide strength, and water volume.