PEPTIDECALCOpen Calculator

Peptide Reconstitution Calculator

Calculate concentration, units, and draw volume instantly.

Peptide Calculator

New to peptides? How to Use Peptides

1. Choose your syringe
Assumes U-100 markings (100 units = 1.0 mL). Math tool only — not medical advice.
2. Select peptide vial amount
3. How much bacteriostatic water are you adding?
4. Desired amount per draw
Your Results
To have a dose of — pull the syringe to —
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. New to reconstitution? How to Use Peptides

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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

How much BAC water do I add to my peptide vial?
There’s no single “right” amount. More water makes a weaker concentration (easier to measure small amounts); less water makes it stronger (smaller draws). Pick a volume that fits your vial and what you’re trying to measure, then enter the vial size and the water you actually added into the calculator so the unit math matches what you mixed.
Why don’t the numbers on my syringe match the milligrams on the vial?
The vial label is total peptide powder. Syringe marks are volume (units / mL). Once you add water, concentration decides how many units equal your target amount. That’s the conversion this tool does.
What does “units” mean on a U-100 insulin syringe?
On a U-100 syringe, 100 units = 1 mL. So 10 units = 0.1 mL and 50 units = 0.5 mL. Units are volume marks — not milligrams of peptide.
Does it matter which peptide I’m calculating?
For the math, no — same inputs (vial amount, water, desired amount). Different peptides use different typical amounts, so use a compound-specific calculator page when you want that context, or this homepage tool for generic mg/mcg math.
Can I mess this up by adding the wrong amount of water?
Adding more or less water doesn’t change how much peptide is in the vial — it changes concentration. If you misremember what you added, your draw volume will be wrong. Enter the actual water you used.
Is this telling me how much peptide to take?
No. This is a reconstitution and unit-conversion helper only. It doesn’t recommend doses. Use your own protocol or a clinician’s guidance for that; use this tool to turn vial size, water added, and a target amount into syringe units and mL.