Free Peptide Blend & Stack Calculator
Calculate exact draw volumes for peptide blends, stacks, and custom multi-peptide preparations. Enter your blend ratios, reconstitution volume, and anchor compound — instantly see every peptide's individual quantity and the total syringe volume. Works with pre-loaded blends like BPC-157 / TB-500 and fully custom mixes. No math required.
Dosing tools
Peptide Blend Dosage Calculator
Calculate blended peptide doses with our visual syringe guide.
Volume of bacteriostatic water you add to reconstitute the powder. Use BAC water for preservation.
1 mL
2 mL
3 mL
5 mL
Custom
Blend Composition
Total: 45.0 mg
mg
mg
mg
The compound you want to dose by. Results will be calculated based on this compound.
The target research quantity of the anchor compound per administration, in mcg or mg.
Conversion: 1,000 mcg = 1 mg
Results
Concentration
45.00
mg/mL
Doses per vial
40
Total blend volume
1.13
mg
You'll get:
- BPC-157
- 250 mcgANCHOR
- KPV
- 250 mcg
- TB-500
- 625 mcg
1mL / 100 units
2 units
0.025 mL
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Dosing Guidance
Recommended Schedule
Once daily
Supply Duration
This vial provides 40 doses (40-day supply at 250 mcg daily)
How the peptide blend & mixing calculator works
Blended peptide vials contain two or more compounds in fixed ratios. Calculating a research quantity means working from one compound's target amount outward — determining the draw volume that delivers the correct quantity of every other compound in the same preparation.
Select a blend or build a custom mix
Choose from pre-loaded peptide blends with known compound ratios, or enter a custom combination. Each compound is listed with its proportion of the total vial content so you know exactly what you're working with before the calculation runs.
Set your reconstitution volume
Enter how much bacteriostatic water you added in milliliters. This sets the concentration of the entire blend — the same volume applies to all compounds proportionally, so their ratios stay constant regardless of how much water you use.
Choose an anchor compound and read your results
Select the anchor compound for your research calculation. The calculator works backward from that target research quantity to determine the draw volume, then shows the resulting quantity of every other compound delivered in the same preparation.
What is a peptide blend?
A peptide blend is a single vial containing two or more peptides in a fixed ratio, reconstituted together in bacteriostatic water. Because the compounds share the same solution, every draw delivers a precise quantity of each one simultaneously — no need to draw from multiple vials. Common research blends and stacks pair peptides with complementary mechanisms to simplify a protocol into a single daily draw. Popular examples include BPC-157 / TB-500 and growth hormone secretagogue combinations.
Back to dosage calculatorUnderstanding blend ratios and multi-peptide dosing
Unlike single-peptide vials, a blend delivers multiple compounds in every preparation. The calculator accounts for the fixed ratio between compounds so each draw reflects the correct research quantity for all of them.
Fixed ratios
Pre-made blends have compound ratios set at manufacture. When you reconstitute a 5 mg BPC-157 / 5 mg TB-500 blend in 2 mL of water, every draw contains both peptides in a 1:1 ratio — you cannot separate them within the same vial.
The anchor compound
Because both compounds are drawn together, you dose the blend by targeting one — the anchor — and accepting whatever the other compounds deliver at that volume. Choose the compound with the tightest dosing requirements as your anchor.
Reconstitution volume and concentration
Adding more water lowers concentration across all compounds and increases draw volume. Adding less raises concentration and reduces draw volume. The ratio between compounds never changes — only the volume needed to reach the target research quantity.
Custom blends
The calculator also supports custom blends where you define each compound's amount. This is useful in research contexts when combining separately reconstituted peptides and verifying each compound's quantity before drawing.
One preparation.Every quantity, verified.
Enter your blend, reconstitution volume, and target compound — the calculator instantly shows the draw volume for the whole blend and the resulting research quantity for every peptide it contains. No spreadsheets, no manual ratio math. Supports pre-loaded blends and fully custom compound combinations. For research purposes only.
Try the accumulation calculatorPeptide blend calculator stats
Instant
multi-compound results
Enter a blend and target research quantity — get the draw volume and individual compound quantities in one calculation.
Custom
blend support
Build any combination of compounds with custom amounts, not just pre-loaded blends.
3
free calculators
Dosage, blend, and accumulation calculators — all free, no account required.
More peptide calculation tools
The blend calculator is one of three free research tools. Use the standard dosage calculator to get the exact draw volume for a single-peptide vial, or use the accumulation calculator to model how peptide concentrations build over a full research cycle. All tools are for research purposes only.
Frequently asked questions
How do I calculate a BPC-157 TB-500 blend dose?
Select "BPC-157 / TB-500" from the pre-loaded blends list (or enter each compound's mg amount manually), set your reconstitution volume, and choose your anchor compound — either BPC-157 or TB-500 depending on which you're targeting. The calculator shows the draw volume plus the resulting quantity of the other peptide in the same preparation. For research purposes only.
What is a peptide stack?
A peptide stack combines two or more peptides in a single research protocol. Unlike a pre-made blend, a stack may be drawn from separate vials and administered together. This calculator handles blended vials — where compounds are reconstituted in shared solution — so every draw contains all compounds at their fixed ratios. For separate-vial stacks, use the standard dosage calculator for each compound independently.
How do I dose a peptide blend?
Select your blend, enter the reconstitution volume (how much bacteriostatic water you used), then choose an anchor compound — the peptide whose quantity you want to target. The calculator determines the draw volume that delivers your target quantity, and shows the resulting quantities for all other compounds in that same draw. For research purposes only.
What is the difference between a peptide blend and a custom mix?
A pre-made blend has compound amounts set at manufacture (e.g., 5 mg BPC-157 + 5 mg TB-500 per vial). A custom mix lets you define any combination of compounds and amounts. Both work the same way in the calculator — enter the amounts, set the reconstitution volume, and pick an anchor compound.
How much BAC water should I use for a peptide blend reconstitution?
Research protocols commonly use 1 mL to 2 mL of bacteriostatic water per blend vial. More water means a lower concentration and a larger draw volume per research quantity. Less water means a higher concentration and smaller draws. The calculator supports any reconstitution volume — enter the exact amount you used for accurate results. For research and laboratory reference only.
What is a peptide blend?
A peptide blend is a single vial containing two or more peptides in a fixed ratio, reconstituted together in bacteriostatic water. Because the compounds share the same solution, every draw delivers a precise quantity of each one simultaneously. Common research blends pair peptides with complementary mechanisms — such as BPC-157 and TB-500 for tissue repair — to simplify a multi-peptide protocol into a single daily draw. These products are for research purposes only.
Can the blend calculator handle multiple peptides at once?
Yes. The calculator supports blends and custom mixes with any number of compounds. Enter each compound's amount in the vial, set the reconstitution volume, and choose an anchor compound. The results show the draw volume and the resulting research quantity for every peptide in the preparation simultaneously.
How is peptide dosage calculated from a blend vial for research?
In a research context, the concentration of each compound in a reconstituted blend is calculated by dividing that compound's content (in micrograms) by the total reconstitution volume in milliliters. For example, in a 5 mg BPC-157 / 5 mg TB-500 blend reconstituted with 2 mL of BAC water, each compound has a concentration of 2,500 mcg/mL. The calculator handles this math automatically — enter the vial amounts, water volume, and target quantity to get the draw volume. For research reference only.