Peptide Calculator

What is a Peptide Calculator?

A peptide calculator (sometimes called a reconstitution calculator or a peptide dosage calculator) is a tool that converts your vial’s peptide amount and added solvent volume into a usable concentration for a dose. It answers questions like: “How many mcg/mL is my solution after mixing?” and “How many syringe units equal my target dose?”.

Put simply, it combines reconstitution and dosage calculations in one place.

1. Reconstitution Calculator: Helps you calculate the concentration of the solution after adding a specific volume of diluent to a peptide vial.
2. Dosage Calculator: Uses the above concentration to tell you exactly how much volume (or syringe units) is needed for your desired dose.

A peptide calculator automates these steps to eliminate manual math errors and to provide precision and consistency. Since peptides are very potent at low doses, even small mistakes can have big effects. Use the Longeviters peptide calculator to dose consistently!

How Does the Peptide Calculator Work?

The peptide reconstitution calculator is simple to use. You just need to choose your peptide, enter the vial amount, the volume of your diluent, and the desired dose. Lastly, pick the size of the syringe. The peptide calculator will then automatically perform the necessary unit conversions and formulae.

As a result, it will display:

1. Concentration of your reconstituted solution (mcg/mL)
2. Draw volume (in mL and syringe units) for your target dose
3. Estimated doses per vial

That should eliminate any potential confusion or manual math - you just draw the number of units in the syringe to get exactly the dose you need. If the calculated volume is larger than the size of your syringe, the tool will clearly showcase that, as well.

Step-by-Step Example

Let's say you have a 5mg peptide vial. You add 3mL of bacteriostatic water to it. You want a 250mcg dose. This is what the Longeviters peptide dosage calculator does:

1. Concentration: (5 \text{mg} \times 1000 = 5000mcg) total peptide in 3mL, so concentration = 5000mcg/3mL ≈ 1667mcg/mL.
2. Volume for 250mcg: 250mcg / 1667mcg/mL ≈ 0.15mL.
3. Syringe units: 0.15mL x 100 = 15 units on a U-100 syringe.

So for a 250mcg dose, you would draw 15 units (0.15mL).

Quick Reference Charts

You can save some time by checking out the charts below for common dosing references and syringe information. Note that they assume the use of U-100 insulin syringes (100 units = 1ml).

Dose-to-Units Reference

Example: 5mg vial + 2mL = 2500mcg/mL, so 250mcg = 0.10mL (10 units). Adjust values to your dose, as needed.

Types of Syringes

Types of Diluents

Storage and Reconstitution Guidelines

Whenever you receive a lyophilised (powder) peptide, store the vial refrigerated (2-8 °C) short-term, or frozen (-20 °C) long-term. Upon reconstitution:

1. With Bacteriostatic Water: Label and refrigerate immediately. The solution is stable for about 28 days. Thaw frozen aliquots as needed, and avoid repeated freeze / thaw cycles.
2. With Sterile Water: Use within 24 hours, and don’t try to draw multiple times from the vial.

Before reconstitution, ensure that the peptide powder and solvent that were stored in the cold are warmed up to room temperature.

Do not use non-pharmaceutical liquids (tap water, saline with additives, etc.) as they can degrade the peptide quality and introduce contaminants. Use only the recommended sterile diluents.