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Calculator

Advanced Peptide Dosage Calculator

Convert subject bodyweight, target dose (absolute or mcg/kg), vial size and bacteriostatic-water volume into the exact draw volume and U-100 / U-50 syringe ticks for any research peptide.

Inputs

Dose mode
kg
mcg/kg

Typical research range: 1 – 10 mcg/kg for healing peptides.

Vial size★ = stocked for BPC-157
mg
Bacteriostatic water
mL
weeks

Frequency: 7 administration(s) per week

Results

Target dose

400 mcg

Concentration

2500 mcg/mL

Draw volume

0.160 mL

Ticks on U-100

16.0

Doses per vial

~12

Bodyweight

80.0 kg

Full cycle (8 weeks)

You'll need approximately 22.4 mg of BPC-157 in total — that's 5 × 5 mg vials at 7 administration(s) per week.

Calculations run entirely in your browser; no inputs leave your device. For laboratory / research-stage reference only.

How this calculator works

The dosage calculator combines two well-established laboratory conversions. First, it derives the peptide concentration from the mass in the vial and the volume of bacteriostatic water used to reconstitute it: concentration (mcg/mL) = vial mass × 1000 ÷ BAC water volume. Second, it derives the required draw volume for the desired dose: volume (mL) = target dose ÷ concentration. The number of ticks on an insulin syringe is then volume × 100 for both U-100 (1 mL = 100 ticks) and U-50 (0.5 mL = 50 ticks) presentations.

Bodyweight-scaled dosing

Many healing-class peptides — including BPC-157 and Thymosin Beta-4 (TB-500) — are researched at dose ranges expressed in micrograms per kilogram of bodyweight, typically between 1 and 10 mcg/kg. The calculator multiplies subject weight (after converting from pounds if necessary) by your selected mcg/kg value to derive the absolute dose, then carries that forward through the volume conversion.

Assumptions

  • U-100 insulin syringe: 100 marked ticks = 1 mL.
  • U-50 insulin syringe: 50 marked ticks = 0.5 mL (the markings have the same scale but the body holds half the volume).
  • Concentration is uniform — gentle vial inversion is sufficient; never shake.
  • The reference range shown beneath the dose input reflects published research-stage protocols for the selected peptide.

Supporting research

  • Sikiric P et al., The pharmacological properties of the novel peptide BPC 157 (PL-10), Inflammopharmacology, 1993.
  • Goldstein AL et al., Thymosin β4: actin-sequestering protein moves to centre stage of medical sciences, Br J Cancer, 2005.
  • Falutz J et al., Effects of Tesamorelin on Visceral Fat in HIV-Infected Patients, NEJM, 2007.
  • Wilding JPH et al., Once-Weekly Semaglutide in Adults with Overweight or Obesity, NEJM, 2021.

Related tools

Frequently asked questions

How is research peptide dosage calculated?
Dose volume (mL) equals target dose (mcg) divided by concentration (mcg/mL). Concentration equals vial mass × 1000 ÷ bacteriostatic water volume. The calculator combines both steps and converts the volume into ticks on a U-100 or U-50 insulin syringe.
What is the typical mcg per kg range for research peptides?
Healing-class peptides like BPC-157 and TB-500 are most often investigated at 1–10 mcg/kg of bodyweight per administration. Growth-hormone-axis peptides are typically dosed as absolute amounts rather than per-kilogram values.
What is the difference between a U-100 and U-50 insulin syringe?
A U-100 syringe holds 1 mL with 100 graduated ticks; a U-50 holds 0.5 mL with 50 graduated ticks. Both use the same tick scale (1 tick = 0.01 mL), so a 0.10 mL draw is 10 ticks on either syringe — the U-50 just has a smaller body for higher precision.
Does the dosage calculator account for peptide purity?
No — the calculator assumes the labelled mass on the vial is the pure peptide mass. Always verify a certificate of analysis (CoA) for your specific lot; reputable suppliers provide HPLC-confirmed purity values.
Why does the calculator state "research use only"?
The peptides referenced here are research chemicals, not approved therapeutics. They are intended for laboratory and educational reference only and are not suitable for human consumption. See the full disclaimer for the legal framing.