NoticeFor research and educational purposes only. Content on this site is not medical advice and is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before making decisions about your health.

Calculator

For powder peptides. Calculates diluent and injection volume.

Reconstitution Calculator
1

What's in your vial?

mg
2

How much diluent?

mL
3

What's your dose per injection?

4

How often will you inject?

Your Recipe

1
Add — mL of BAC water to your — mg vial.
2
Draw 0.0 units (0.000 mL) on a U-100 insulin syringe per injection.
3
Inject mcg · daily (1x/day).
Visual draw
020406080100
0.0
weeks of doses
0
total doses
0
mcg / mL

Always verify with vendor COA · Research use only

Learn

How to Use a Peptide Calculator

A quick primer on reconstitution, dilution, and dosing math.

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What is a peptide calculator?

A peptide calculator does the math for you. Plug in your vial size, the amount of BAC water you added, and your desired dose — and it tells you exactly how many syringe units to draw on a U-100 insulin syringe. No mental math, no guessing.

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How much BAC water should I use?

It depends on the concentration you want. More water = more dilute (easier to draw small doses accurately). Less water = more concentrated (each unit packs more peptide).

More dilute
3 mL
Best for very small doses & fine-tuning.
Common
2 mL
The everyday sweet spot for most peptides.
More concentrated
1 mL
Fewer units per dose — better for larger amounts.

Most peptides reconstitute well with 1–3 mL. When in doubt, start with 2 mL.

Reconstitution Instructions

1
Sanitize the vials. Wipe the rubber stopper of both the peptide vial and the BAC water vial with a fresh alcohol swab. Let them air-dry for a few seconds before piercing.
2
Draw the diluent. Using a sterile syringe, draw your planned amount of bacteriostatic water (typically 1–3 mL) from the BAC vial.
3
Add water to the peptide. Insert the needle at a slight angle and let the water run slowly down the inside wall of the vial. Don’t blast it directly onto the powder — it can damage delicate peptides.
4
Mix carefully. Let the vial sit for ~30 seconds, then gently swirl (or roll between your palms) until fully dissolved. Never shake — it can denature the peptide.

Store reconstituted vials refrigerated · Use within vendor window

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Disclaimer

The information provided on Pep Girl is for research and educational purposes only and does not constitute medical advice. Statements have not been evaluated by the FDA. Products referenced are intended strictly for laboratory and research use, not for human consumption. Always consult a qualified healthcare professional before making any decisions about your health, and verify each vendor's Certificate of Analysis (COA).

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