OptiPin
Peptide Blend Calculator
When you run more than one peptide together – BPC-157 + TB-500, a GLOW or KLOW stack, a GH combo – each compound has its own vial, concentration and dose. This calculator solves every peptide in the blend independently and gives you the exact syringe units per compound. Pick a preset below to load it straight into the calculator, or build your own from scratch.
Open the blend calculator
Free, in your browser – no account. Then log the dose in the OptiPin app, which tracks each vial and warns before it runs out.
Preset blends – tap to load
How blend dosing works
The arithmetic is the same as a single vial – just repeated per compound. For each peptide, concentration = vial size ÷ water added, and your dose ÷ concentration gives the volume, which on a U-100 insulin syringe is read in units (1 unit = 0.01 mL). The catch with a blend is that the peptides usually have different vial sizes and target doses, so each one lands on a different number of units even when they share a schedule. That's exactly the bookkeeping the calculator removes: load a preset like GLOW and it fills every compound's vial and dose, then shows the per-peptide units side by side. Change any value and the rest stay independent.
For the single-compound version of the same math – and the step-by-step reconstitution walkthrough – see the peptide reconstitution calculator. For what each peptide actually is, browse the peptide reference.
Logging it in the OptiPin app
Once this calculator gives you the units, OptiPin on iPhone logs the dose you draw. Set the blend up as one medication or as its separate compounds. Either way a GLOW or Wolverine protocol shows up as one stack, not four disconnected entries, with site rotation and vial runout warnings across the whole thing. The app does not do the reconstitution math; you type the units in.
FAQ
What is a peptide blend calculator?
It works out the per-peptide dose when more than one compound is reconstituted in the same protocol. For each peptide you set vial size and water; it returns the concentration and exact syringe units, so a stack like BPC-157 + TB-500 needs no hand math.
What are GLOW and KLOW?
GLOW is a BPC-157 + TB-500 + GHK-Cu skin-and-healing blend; KLOW adds KPV as a fourth peptide. Both are presets here – tap one to load it into the calculator. They're reference templates, not a dose recommendation.
Can I build a custom blend?
Yes – add each peptide, set its vial and water, and every compound is solved independently. Start from a preset and adjust, or build from scratch.
Is it free?
Yes, free in your browser with no account. Once you have the units, the OptiPin iPhone app logs the dose you enter and tracks the vial; it does not do the math itself.
Related
Peptide reconstitution calculator · Peptide reference · Half-life visualizer · All calculators · Peptide guide · Wolverine stack calculator (BPC-157 + TB-500) · Peptide pen calculator