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Calculator Answers

Peptide Calculator

Blake Boege
Written by Blake Boege · Founder, Calculator Answers

A peptide calculator is a mathematical dosing utility used to calculate reconstitution ratios for injectable peptide solutions. It takes the total weight of the freeze-dried peptide powder in milligrams, the volume of bacteriostatic water added to dissolve the powder, and the target dose in micrograms, and converts them into the exact syringe units (IU) to draw. This ensures accurate delivery of peptide quantities for research and clinical purposes.

Calculate peptide reconstitution dosage and bacteriostatic water mixing. Get exact units to draw on a U-100 or custom syringe.

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Quick Answer

Calculate the exact volume and units on a syringe needed to draw a desired peptide dose after reconstituting a powder vial with bacteriostatic water.

mg

Quantity of peptide in the vial · e.g. 5

mL

Volume of water added to vial · e.g. 2

mcg

Target dose per injection · e.g. 250

units/mL

U-100 is 100 units per mL · e.g. 100

Dosing results

Draw on Syringe

10 units

Inject volume: 0.1 mL

Units to Draw10 syringe units
Injection Volume0.1 mL
Vial Concentration2.5 mg/mL
Vial Concentration (mcg)2,500 mcg/mL
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How it works

Enter the peptide amount in milligrams (mg), the volume of bacteriostatic water added in milliliters (mL), and your desired dose in micrograms (mcg) to calculate the corresponding syringe drawing units.

Concentration (mg/mL) = Peptide (mg) ÷ Water (mL)

Concentration (mcg/mL) = Concentration (mg/mL) × 1,000

Inject Volume (mL) = Desired Dose (mcg) ÷ Concentration (mcg/mL)

Syringe Units to Draw = Inject Volume (mL) × Syringe Size (units/mL)

How to mix and calculate peptide doses

Peptides are typically distributed as freeze-dried (lyophilized) powder in sterile vials. Reconstitution is the process of adding a liquid solvent (usually bacteriostatic water) to dissolve the powder into an injectable liquid solution.

FORMULA: Units to Draw = (Desired Dose in mcg ÷ ((Peptide in mg ÷ Water in mL) × 1,000)) × Syringe Size

EXAMPLE: If you have a 5 mg vial of peptide, add 2 mL of bacteriostatic water, and want a 250 mcg dose using a standard U-100 syringe (100 units/mL):

  • Concentration: 5 mg ÷ 2 mL = 2.5 mg/mL
  • Micrograms: 2.5 mg/mL × 1,000 = 2,500 mcg/mL
  • Injection Volume: 250 mcg ÷ 2,500 mcg/mL = 0.1 mL
  • Units on U-100 Syringe: 0.1 mL × 100 units/mL = 10 units

⚠️ Medical Disclaimer

This peptide calculator is a mathematical utility provided for informational and educational purposes only. It is not intended to serve as medical advice, diagnosis, or treatment guidelines. Always consult a qualified medical doctor, pediatrician, or endocrinologist before administering any peptide therapy, mixing medications, or executing clinical dosage plans.

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Frequently asked questions

It computes your injection dosage by dividing the desired dose (in mcg) by the concentration of the reconstituted solution. The concentration is calculated by dividing the peptide quantity (in mg) by the volume of added bacteriostatic water (in mL).

A U-100 syringe contains exactly 100 units per 1 milliliter (mL) of volume. This is the standard sizing for insulin syringes and is the default setting for this calculator.

Multiply the volume to inject (in mL) by the syringe units per mL rating. For example, 0.1 mL of volume on a U-100 syringe (100 units/mL) equals exactly 10 units (0.1 × 100 = 10).

Bacteriostatic water is sterile water containing 0.9% benzyl alcohol, which acts as a preservative to inhibit the growth of bacteria, making it suitable for multi-dose peptide vials.

No. This tool is a mathematical calculator intended for informational and educational reference. Always consult a licensed medical professional for dosage guidelines and clinical advice.