SPK
SPK Pharma India
Pharmaceutical Trading & Distribution

Research tool

Peptide Dosage Calculator

Calculate the reconstitution volume and injection dose for research peptides. Enter your vial size, the volume of bacteriostatic water you used, and the dose you need. Results update live. Supports both 40 IU and 100 IU insulin syringes.

Inputs

mg
mL
mcg

U-100 (100 IU/mL) and U-40 (40 IU/mL) are the two common 1 mL insulin syringe calibrations. Each tick on a U-100 syringe is 0.01 mL; each tick on a U-40 is 0.025 mL.

Result for this dose

Concentration 2,500mcg/mL
Volume to draw 0.100mL
Draw on selected syringe 10IU (U-100)

Visual: 100 IU syringe

0255075100

Red marker shows where to fill. Bar shows the resulting volume inside the 1 mL barrel.

Vials used per dose 1.00
Doses remaining in this vial 20

Dose reference for this vial

Common injection volumes drawn from this vial, on a U-100 syringe.

Dose Volume (mL) U-100 syringe U-40 syringe

How to use this calculator

  1. Enter the vial size in milligrams (mg) — the amount of lyophilized peptide powder in the vial.
  2. Enter the bacteriostatic water volume in milliliters (mL) — the amount of diluent you add to the vial to dissolve the powder.
  3. Enter the desired dose in micrograms (mcg). The calculator converts to the volume you need to draw.
  4. Choose your syringe type — U-40 (40 IU per 1 mL) or U-100 (100 IU per 1 mL). The result tells you how many tick marks to fill.
  5. Draw the calculated volume using your insulin syringe and administer per protocol.
How the math works. Concentration (mcg/mL) = vial mg × 1,000 ÷ water mL. Volume to draw (mL) = desired mcg ÷ concentration. Syringe units = volume mL × syringe IU/mL (e.g. on a 100 IU syringe, 0.10 mL = 10 IU; on a 40 IU syringe, 0.10 mL = 4 IU).
For research and laboratory use only. This calculator is a reconstitution math utility. It does not constitute medical or dosing advice. Always verify calculations against the specific Certificate of Analysis (COA) for the lot you are working with, and follow the protocols established for the specific molecule and the regulations in your jurisdiction. Not approved as a drug, medical device, or diagnostic agent in any jurisdiction. Not for human or veterinary use.