Free · Arithmetic Only · Not Medical Advice

Peptide Reconstitution & Dose Calculator

Convert a dose you already have — from a prescription, protocol, or product label — into a volume you can actually measure and draw into a syringe. This is math, not medical advice: it doesn't tell you what dose to take.

Open the Calculator →
Concentration, dose volume, and doses-per-vial in one step

What this actually is

  1. 1Enter the peptide amount in the vial and how much bacteriostatic water you're adding — that gives you the concentration.
  2. 2Enter your target dose (from your prescription or protocol) — the calculator converts it to a syringe volume you can actually draw.
  3. 3Always read the result back against your prescription or protocol before drawing anything into a syringe. If a number looks off, don't use it.

Who this is for

This kind of math is simple in theory and easy to get wrong under time pressure — this exists to double-check a number, not to decide it for you.

  • Patients following a prescribed reconstitution protocol who want to double-check the math before drawing a dose
  • Clinic staff cross-checking a calculation quickly between patients
  • Researchers working with lab compounds who need to convert a known amount into a working solution
  • Anyone re-deriving a calculation they were taught once and don't fully remember
  • People switching between insulin-unit and mL syringe markings who want both figures side by side

Frequently asked questions

How do I calculate peptide reconstitution?

Concentration equals the peptide amount in the vial divided by the volume of liquid (bacteriostatic water) you add. Once you know the concentration, dose volume equals your target dose divided by that concentration.

Is this calculator medical advice?

No. It's a math tool that converts a dose you already have — from a prescription, protocol, or product label — into a volume you can measure. It doesn't tell you what dose to take. Follow your prescriber's or product's dosing instructions.

Is this calculator free?

Yes, completely free, no account required.

What units does the calculator use?

mg or mcg for peptide amount, mL for water volume, and both mL and insulin-syringe (IU) units for the final draw volume.

Does it store or send my inputs anywhere?

No — every calculation runs locally in your browser. Nothing you enter is saved or transmitted.

What if my vial size isn't a round number?

Enter the exact number printed on your vial or lab certificate — the calculator doesn't round or assume standard sizes, so precision in equals precision out.

Being straight about this: this calculator does simple arithmetic (concentration = amount ÷ volume; dose volume = dose ÷ concentration; syringe units = dose volume × syringe scale). It can't catch a typo, a wrong vial size, or a unit mix-up. Talk to a licensed healthcare provider before using any peptide — many sold as "research use only" aren't evaluated by the FDA for human use. This tool has no idea what peptide you're calculating for and makes no claim about safety, efficacy, or appropriate dosing for any substance.