For research and educational purposes only. Peptides are not approved for human use unless specifically indicated. Read full disclaimer.
PeptideHub

Peptide Mixing Calculator

Calculate diluent ratios, final concentrations, and dose volumes when combining two or more reconstituted peptide solutions. Use this tool to plan research blend protocols and verify that each component reaches its target dose in a single combined injection.

Common research range for BPC-157: 250–500 mcg, 2× daily, subcutaneous. Cycle: 4 weeks on / 2 off.

Educational use only. This calculator performs unit math on the values you provide and is not a substitute for medical advice. Verify every calculation independently.

Result

Concentration
2500 mcg / mL
Per syringe unit
25.00 mcg / unit
Draw to this mark
15.0 units (0.15 mL)
Dose, all units
375 mcg · 0.375 mg
Doses per vial
13.3 doses
Days per vial
6.7 days
Vials needed for 4-week cycle
5 vials

Numbers are computed from your inputs. Verify all calculations independently. Educational use only.

How to Use This Calculator

  1. Identify the peptides and their vial sizes: List each peptide you plan to combine and its mass in mg. Enter each vial size into the calculator.
  2. Enter the diluent volume for each peptide: Input how much BAC water (or other diluent) you add to each vial before combining. This sets the individual concentrations.
  3. Enter volumes to combine: Specify how much of each reconstituted solution you will draw into the final blend. The calculator tracks total volume and each component's share.
  4. Review final blend concentration: The calculator returns the concentration of each peptide in the combined solution (mcg/mL) and the total volume.
  5. Calculate per-dose draw volume: Enter the target dose for each peptide. The calculator determines the draw volume that delivers both doses simultaneously from the blend.

Example Calculation — BPC-157 + TB-500 Blend

A researcher wants to combine 250 mcg BPC-157 and 500 mcg TB-500 in a single injection.

Setup:

  • BPC-157: 5 mg vial + 2 mL BAC water = 2,500 mcg/mL
  • TB-500: 5 mg vial + 2 mL BAC water = 2,500 mcg/mL
PeptideTarget doseConcentrationVolume to drawU-100 units
BPC-157250 mcg2,500 mcg/mL0.10 mL10 units
TB-500500 mcg2,500 mcg/mL0.20 mL20 units
Combined——0.30 mL total30 units

Diluent Choice Reference

DiluentpHPreservativeBest for
Bacteriostatic water (BAC)~5.70.9% benzyl alcoholMost peptides — multi-use vials
Sterile water for injection~6.0NoneSingle-use only
Sterile saline (0.9% NaCl)~5.5NoneIV use, some peptides
Acetic acid (0.1%)~3.4NonePoorly soluble peptides (GH, some GFs)

Frequently asked questions

Can you mix two different peptides in the same vial?+

Researchers do combine peptides in the same syringe for convenience, though this practice introduces variables around pH compatibility and stability that are not well-characterised for all combinations. When blending, the total volume and mass of each peptide must be tracked separately to calculate accurate per-dose amounts.

How do I calculate the final concentration after mixing two peptide solutions?+

Final concentration of peptide A = (volume A × concentration A) ÷ total volume. The total volume is the sum of all volumes added. This calculator applies that formula for each peptide component in the blend.

What diluents can I use when mixing peptides?+

Bacteriostatic water is the standard diluent for research peptides — it preserves the solution for approximately 30 days. Sterile water for injection, sterile saline (0.9% NaCl), and sterile acetic acid (0.1–1%) are alternatives used when a peptide is poorly soluble in neutral pH. Acetic acid is sometimes used for GHK-Cu and certain growth factors.

Does mixing peptides reduce their stability?+

Stability data for mixed peptide solutions is sparse. As a precaution, researchers typically mix only what is needed for immediate use, store the combined solution refrigerated, and use within the stability window of the least stable component.

How do I calculate the dose of each peptide when using a blend?+

Dose of peptide A = volume drawn × final concentration of A in the blend. Because both peptides share the draw volume, you can achieve a combined dose in a single injection. The mixing calculator shows both component concentrations and dose contributions per draw volume.

What is the most common peptide mixing combination in research?+

Combinations studied in the preclinical literature include BPC-157 and TB-500 (often stacked for tissue repair research), and various GHRP/GHRH combinations such as Ipamorelin with CJC-1295 to study synergistic GH release. These are referenced in research contexts only — not as clinical recommendations.

Can I mix a lyophilized peptide directly with another reconstituted peptide?+

It is possible but requires careful volume calculation. The reconstituted peptide acts as part of the diluent for the second peptide. Track the total volume and each component's mass to determine the final blend concentration accurately.