Free Peptide Blend & Stack Calculator

Reviewed by the PeptideMind Team · Updated July 6th, 2026

Free Peptide Blend 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. For research purposes only — no signup required.

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What is a peptide blend?

One vial, two or more peptides

A peptide blend is a single vial containing two or more peptides in a fixed ratio, reconstituted together in bacteriostatic water.

Every draw delivers all compounds

Because the compounds share the same solution, every draw delivers a precise quantity of each one simultaneously — no need to draw from multiple vials.

Complementary combinations

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.

Popular named peptide blends

GLOW, KLOW, and the Wolverine stack are common multi-peptide vials sold as fixed-ratio preparations. Typical research dosage guides for each can be found further down this page.

GLOW

BPC-157, TB-500, and GHK-Cu, typically totaling around 70 mg per vial. Ratios vary by supplier.

KLOW

BPC-157, TB-500, KPV, and GHK-Cu, typically totaling around 80 mg per vial. Ratios vary by supplier.

Wolverine stack

A recovery-focused pairing built around BPC-157 and TB-500, popular as a growth-hormone secretagogue combination.

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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.

Understanding 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

A blend's compound ratio is set at manufacture — every draw delivers each peptide in that same fixed proportion.

The anchor compound

Dose the blend by targeting one compound, the anchor, and accept what that volume delivers of the rest.

Reconstitution volume and concentration

More water lowers concentration and raises draw volume; less does the opposite. The ratio itself never changes.

Storing and tracking a reconstituted blend

Once a blend is reconstituted, how you store it and track what's left matters as much as the initial ratio math. These are the practical details most calculators skip.

Storage and stability

Keep reconstituted blends refrigerated and shielded from light. Avoid repeated freeze-thaw cycles, which can degrade the peptides.

Doses per vial

Doses per vial depend on your reconstitution volume and per-draw target. Track remaining volume so late draws stay accurate.

Unit conversion reference

1 mg = 1,000 mcg, and a U-100 syringe reads 1 mL as 100 units — how the calculator maps your dose to syringe markings.

Frequently asked questions

Straight answers on blend ratios, anchor compounds, and reconstitution volumes for multi-peptide research protocols.

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.

Search Peptide Blend Guides

Search our library of peptide blends and stacks for vial size, BAC water, dosing, frequency, and cycle length. Tap any guide to load it straight into the calculator.

Free Downloadable Peptide Dosage Cheat Sheets

Reference dosage data for 100+ peptides is pre-loaded in these free cheat sheets, including common research stacks like the wolverine stack (BPC-157 + TB-500), MOTS-C, Retatrutide, and Semaglutide. Select a cheat sheet to see reference dose ranges, dosing frequency, and half-life for every peptide it covers. For research purposes only.

16 peptides

13 peptides

18 peptides

5 peptides

15 peptides

Peptide 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.

Peptide dosage calculator

Peptide accumulation calculator