Peptide Reconstitution Calculator

Calculate concentration, units, and draw volume instantly.

Peptide Calculator

What is the total volume of your syringe?
Assumes U-100 markings (100 units = 1.0 mL). Math tool only — not medical advice.
Select peptide vial amount
How much bacteriostatic water are you adding?
Desired amount per draw
Results
Concentration
— —
Per Unit (U-100)
— mcg/unit
Draw
— units (— mL)
Syringe Max
— units
This calculator performs unit conversion math only and does not provide medical guidance.
To have a dose of — pull the syringe to —

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How to Use the Peptide Reconstitution Calculator

This peptide reconstitution calculator helps you determine the correct syringe draw amount after mixing a peptide vial with bacteriostatic water. Enter your vial size, the amount of bacteriostatic water added, and your desired dose to instantly calculate the correct number of insulin syringe units.

The calculator automatically converts between mg, mcg, and syringe units so you can avoid manual math errors and get a clear draw amount in seconds.

Step 1: Select Your Syringe Size

Choose your syringe size (U-100 = 100 units = 1 mL).

  • 30 unit (0.3 mL)
  • 50 unit (0.5 mL)
  • 100 unit (1 mL)

Step 2: Select Your Vial Amount

Pick the amount of peptide in your vial (or use Other).

  • 5 mg
  • 10 mg
  • 15 mg

Step 3: Enter Water Added

The amount of bacteriostatic water determines the final concentration.

  • 1 mL
  • 2 mL
  • 3 mL
  • 5 mL

Step 4: Choose Your Dose

Select your dose in mg or mcg. The calculator shows your exact draw in units and mL.

  • Concentration
  • Per-unit amount
  • Units to draw + mL
  • Syringe capacity

Note: This tool performs mathematical unit conversions only and does not provide medical advice.

Peptide Reconstitution Calculator FAQs

What is peptide reconstitution?
Peptide reconstitution is mixing a lyophilized (freeze-dried) peptide powder with bacteriostatic water to create a liquid solution that can be measured and drawn with a U-100 insulin syringe.
How do you calculate peptide dosage after reconstitution?
First, determine concentration by dividing the total peptide amount in the vial by the total mL of bacteriostatic water added. Then convert your desired dose to syringe units. This calculator performs those conversions instantly based on your inputs.
How many units are in a 1 mL insulin syringe?
A U-100 insulin syringe has 100 units per 1 mL. For example: 10 units = 0.1 mL, 25 units = 0.25 mL, and 50 units = 0.5 mL.
Why use bacteriostatic water for peptides?
Bacteriostatic water contains benzyl alcohol, which helps inhibit bacterial growth after the vial is punctured. Many people use it to reduce contamination risk when storing reconstituted solutions for a limited time.
Can this calculator be used for any peptide?
It works for most peptides measured in mg or mcg. Enter your vial amount, water added, and desired dose to get the concentration and the syringe draw amount in units and mL.
Is this calculator medical advice?
No. This is a math and unit-conversion tool only. It does not provide medical advice. Always consult a qualified medical professional for dosing guidance.