Awesome Labs

Peptide Math — How to Easily (and Accurately) Calculate Doses

Units? Micrograms? Milliliters? Tick Marks? Frustrated? PepCalc makes peptide math simple

6 small, unopened peptide vials on a table with a bottle of bacteriostatic water behind them.
Calculating accurate peptide doses can be difficult and frustrating. It doesn’t have to be.
Quick Note: Peptides are still a “gray” area (they can be sold for research purposes, but legally consumers need a prescription to use them), so I am unable to discuss where or how to purchase. Best to find a practitioner or clinic that offers peptide therapy.

Peptide Dose Calculation Math

Without getting into the actual math, the problem can be stated as such:

Peptide Dose Calculation Variables

Let’s take a closer look at the variables that need to be taken into consideration to accurately calculate doses:

1. Desired Peptide Dose

This is the starting point — how much peptide powder (not including the liquid) needs to be in the syringe? Peptide doses are usually measured in micrograms (mcg), but sometimes they may be shown in milligrams (in which case just divide by 1,000 to get micrograms).

3 examples of insulin syringes on the left; 3 examples of tuberculin (non-insulin) syringes on the right.
Left: U-40 insulin syringes (in units); Right: Tuberculin syringes in mL/cc)

2. Syringe Details (Type, Units, Tick Marks, Volume)

This is where things start to get complicated because syringes come in a number of different configurations:

The peptide dosing confusion stems from the fact that peptide users generally work with insulin syringes but do not have premixed vials of peptide solution.

A U-100 insulin syringe on the left with 100 tick marks; another U-100 insulin syringe on the right with 50 tick marks.
Left: 1 mL U-100 insulin syringe with 100 tick marks; Right: 1 mL U-100 insulin syringe with 50 tick marks

3. Vial Details

Peptides typically come in a small sealed vial in powder form and must be reconstituted with bacteriostatic (sterile) water before they can be used.

A bottle of bacteriostatic water next to a small vial with a syringe in the background.
A bottle of bacteriostatic water next to a small vial with a syringe in the background.
Preparing to add bacteriostatic water to a vial of research peptides

Existing Peptide Dose Calculators — Difficult to Use, Sometimes Inaccurate

Jeremy and I started out by making our own spreadsheets to manage calculations. We tried searching for an existing tool that could suit our needs (why re-invent the wheel, right?), and while we did find several web-based calculators, they all had drawbacks — from non-intuitive user interfaces to inflexible or missing options, and in some edge cases would even produce inaccurate results (when we double-checked their math).

Introducing PepCalc — a Simple Peptide Reconstitution and Dose Calculator

If all of this sounds overwhelming, fortunately, there is now an easier way! As I alluded to earlier, we decided to build an app to take all of the headache out of peptide math. It’s called PepCalc, and it’s available on both iOS and Android. We’d love for you to check it out! 👇👇

Website screenshot of PepCalc peptide calculator app
Website screenshot of PepCalc peptide calculator app
PepCalc, our peptide calculator app. Available on iOS and Android!

🤖 Technology + 💻 Data + 💪 Wellness. 💡 Entrepreneur. 🎸 Musician. ⚽️ Athlete. aka @QuantifiedBob. Co-founder @AwesomeLabsLLC