Peptide Blend Calculator
In a blend vial every component dissolves in the same liquid, so one volume holds all of them in fixed proportions. Enter each component and the liquid added to see each one’s concentration and how much of each is in the volume you measure.
Peptide Blend Calculator
Blend calculator
Used to round to the nearest marking you can actually read.
Enter each component, the liquid added and what to work out.
Arithmetic only: it never suggests or assesses an amount. Nothing you type leaves your browser.
How blend math differs from a single vial
A single-peptide vial has one concentration. A blend has one per component, but only one volume: whatever you measure carries every component at once. So you choose which number to work from:
- One component: the volume that holds a target amount of one component, and what the others come to in that same volume.
- Combined total: the volume that holds a combined amount of all components that share a unit.
- A volume: what each component amounts to in a volume you measured.
component per mL = component amount ÷ liquid addedcomponent in a volume = volume × component amount ÷ liquid addedWorked example: an uneven 10 mg + 5 mg blend
A vial holds 10 mg of component A and 5 mg of component B, and you add 3 mL.
| Component A | Component B | Combined | |
|---|---|---|---|
| Per mL | 3.333 mg | 1.667 mg | 5 mg |
| Share of the vial | 66.7% | 33.3% | 100% |
| In 20 units (0.2 mL) | 666.7 mcg | 333.3 mcg | 1,000 mcg |
Because the ratio is fixed by the vial, you can’t get more of A without more of B in the same volume. The calculator makes that visible for any number of components (up to eight).
Components in different units
Components in mg and mcg add up exactly. A component labelled in IU can’t be added to mass components without its IU factor, so the calculator leaves it out of combined totals and shares and says so, instead of guessing.
Frequently asked questions
How do I work out each peptide in a blend?
Divide each component’s amount by the liquid added to get its concentration. Any volume then holds volume × concentration of each one. The calculator does this for every component at once.
What if the blend ratio is uneven?
That’s fine: each component is calculated from its own amount. A 10 mg + 5 mg blend in 3 mL holds twice as much A as B in every volume.
How much bacteriostatic water should I add to a blend?
The same reasoning as a single vial: the amounts don’t change, only the volume per amount. Choose a volume that puts the amount you work from on a readable syringe marking. The blend math guide has examples.
Can I combine two separate vials into one?
Then you have a new solution: add the amounts and the volumes, and calculate it as a blend. Mixing compounds is a decision for your own research protocol; the calculator only does the arithmetic.
Related calculators and guides
- GuideBlend Vial Math: Each Peptide in One VolumeHow multi-peptide blend vials work in numbers: one liquid, one volume, fixed proportions.
- CalculatorReconstitution calculatorWork out concentration after adding bacteriostatic water, then the mL and U-100 units for any amount.
- GuideInsulin Syringe Units Explained1 mL is 100 units on a U-100 syringe.
- CalculatorConcentration calculatorCalculate a solution’s concentration in mg/mL and mcg/mL, the amount in 0.1 mL or one U-100 unit, and how to dilute it with C1V1 = C2V2.
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Keep a record, not just a result
Peptide Library is the free research and tracking platform behind this calculator, on the web, iPhone and Android.
- Schedules and remindersPlan entries and get reminded, with a calendar of past and upcoming ones.
- Logs and journalA history of every entry, with notes and check-ins.
- InventoryWhat’s left in each vial, with run-out and reorder dates.
- Research libraryProfiles for 200+ peptides, side-by-side comparison and human evidence summaries.
Get the app: App Store (tracking, no calculator) · Google Play (tracking and calculators)
Last reviewed · How the calculations work