Enter your vial size, BAC water volume, and target dose per compound — the calculator returns the exact number of clicks per injection for your specific pen. Works for Wolverine, Glow, Klow, and any single-compound pen.
Pen & Vial Setup
Total Peptide in Vial (mg)
BAC Water Added (mL)
Pen Type / Click Volume
Custom Click Volume (mL)
Pen Units per mL
Compounds & Target Doses
Calculated Clicks per Dose
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mg/mL total
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mL per dose
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Total clicks
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Doses per vial
Injection Summary
1
Enter vial details
Total peptide in vial (mg) and how much BAC water you're adding. This sets your concentration per mL.
2
Select your pen
Most peptide pens use U-100 insulin needles at 0.01mL per click. Check your pen's documentation if unsure.
3
Set target doses
For blend vials enter per-compound doses. For solo pens enter just one compound. Doses in mcg or mg.
4
Read your clicks
The calculator returns exact clicks per compound, total clicks per injection, mL drawn, and doses remaining in the vial.
Pen Device Guidance
Pre-mixed cartridge pens are available for BPC-157, TB-500, Sermorelin, GHK-Cu and blend vials from various UK research sources.
Reusable pen bodies compatible with standard peptide cartridges include GMP Plastic 80-unit pen (FDA 510k cleared, ISO 11608-2) — suits semaglutide, peptide vials, insulin, and any 3mL cartridge.
Always request a Certificate of Analysis (COA) from any source you use.