Peptide Blend Calculator
Work out what a single draw delivers when two or more peptides share one vial.
Enter each peptide amount and the total liquid volume, then set a target dose for one of them. The calculator returns the draw volume, the U-100 syringe units, and the amount of every other peptide carried in that same draw. It is a math tool only and does not recommend a blend or a dose.
1. Build the Blend
2. Set the Target Dose
Fill is shown on a 100-unit U-100 syringe scale.
| Peptide | In vial | Concentration | Delivered per draw |
|---|
3. The Rule That Governs Every Blend
When peptides share a vial, their ratio is fixed the moment the vial is made. A single draw always contains all of them in exactly that proportion, so there is no way to raise one peptide without raising every other by the same factor.
That is why the calculator asks you to nominate one peptide to drive the dose. It solves for the draw that hits your target for that peptide, then reports what the rest of the blend delivers as a consequence. If those consequent amounts are not what you want, the blend ratio itself has to change, or the peptides have to stay in separate vials.
4. Example
A vial holds 5 mg of peptide A and 10 mg of peptide B, reconstituted with 2 mL. That gives 2.5 mg/mL of A and 5 mg/mL of B.
Targeting 250 mcg of peptide A requires 0.1 mL, which is 10 U-100 syringe units. That same 0.1 mL also carries 500 mcg of peptide B. Doubling the draw to reach 500 mcg of A would simultaneously take peptide B to 1,000 mcg.
Note that changing the liquid volume does not change this relationship. Reconstituting the same vial with 4 mL instead of 2 mL halves both concentrations, so the draw doubles to 0.2 mL, but each draw still delivers 250 mcg of A alongside 500 mcg of B.
5. Important Limits
- This tool performs arithmetic only. It does not assess whether any two peptides can be combined.
- Chemical compatibility, stability, pH, sterility, and preservative interactions are outside what any calculator can determine.
- Dry peptide displaces a small amount of liquid, so the true final volume can be slightly higher than the liquid added and every concentration here is an estimate.
- Results assume the vial is fully dissolved and evenly mixed before each draw.
- This calculator does not determine what any dose should be. Follow instructions from your clinician or pharmacist.
7. Blend Calculator FAQ
What does the peptide blend calculator do?
The blend calculator takes two or more peptide amounts that share a single reconstituted vial, plus the total liquid volume, and calculates the concentration of each peptide. You then set a target dose for one peptide, and the calculator shows the draw volume in mL and U-100 syringe units along with how much of every other peptide that same draw delivers. It is a math tool only and does not recommend a blend or a dose.
Can I dose each peptide in a blend independently?
No. Once peptides share a vial, their ratio is fixed by the amounts you put in. Every draw contains all of them in that same proportion, so changing the draw to adjust one peptide changes all the others by the same factor. If you need to vary two peptides independently, they have to be kept in separate vials.
Does the total liquid volume change the ratio between peptides?
No. Adding more or less liquid changes every concentration by the same factor, so the ratio between the peptides stays the same. More liquid means a larger, easier-to-measure draw for the same delivered amounts; less liquid means a smaller draw. The ratio is set only by the peptide amounts placed in the vial.
Does adding dry peptide change the final volume?
Lyophilized peptide powder does add a small amount of volume when dissolved, so the true final volume can be slightly higher than the liquid added. At typical peptide amounts this displacement is very small relative to the liquid volume, but it means every calculated concentration is an estimate rather than an exact measured value.
Can this calculator tell me whether peptides can be safely mixed?
No. This tool performs arithmetic only. It does not assess chemical compatibility, stability, sterility, pH, preservative interactions, or whether any combination is appropriate. Compatibility and sterile preparation questions must go to a qualified pharmacist or clinician.