Peptide Calculator

BPC-157• Semaglutide• TB-500• Ipamorelin• Sermorelin• CJC-1295• Tirzepatide• Retatrutide• Melanotan II• PT-141• GHK-Cu• Tesamorelin• AOD-9604• MOTS-c• SS-31• Epitalon• DSIP• PEG-MGF• IGF-1 LR3• Hexarelin•

How to Use the Peptide Calculator

It is used to determine correct reconstitution ratios and syringe measurements. Conversions between mg, mcg, mL, and insulin syringe units are necessary to determine how many units to draw, how many doses are available per vial, and the estimated duration of your supply.

Here is a vial reconstitution protocol, a step-by-step guide with example.

We'll use a standard approach for a 250 mcg dosage from a 5 mg BPC-157 vial reconstituted with 2 mL of BAC water.

Start by choosing the insulin syringe size you will use for dosing your peptide. The correct syringe size determines how you measure and draw your dose accurately. Insulin syringes are marked in units, and each unit represents a small volume of liquid. (1 mL syringe = 100 units, where each unit equals 0.01 mL of liquid.)

Common syringe sizes include:

0.3 mL (30 units): Smallest size, useful for very precise, small doses.
0.5 mL (50 units): Medium size, suitable for moderate doses.
1 mL (100 units): Most commonly used, ideal for larger doses or additional volume.

Next, enter the total amount of peptide powder in your vial. Which are stated on the vial labels or certificates (COAs). Typical vial sizes include:

5mg
10mg
15mg

Or you can add custom values if using different strengths. Peptide quantity directly affects the concentration of the solution, so it is important to input this information accurately to get precise dosing. Make sure to double-check the vial quantity.

Example: Your vial contains 5 mg of BPC-15. This means you have 5 milligrams of dry powder to dissolve in your chosen volume of solvent. Select here 5 mg and continue with the next steps.

Warning : Double-check the vial label before entering this number. A 5 mg vial and a 10 mg vial of the same peptide will produce completely different concentrations when the same amount of water is added. Entering the wrong vial quantity is one of the most common sources of dosing error.

Now, enter the amount of bacteriostatic water (BAC water) or other research-grade solvent that you plan to add to your peptide vial.

Common choices include:

1ml
2ml
5ml
Custom Values

Concentration is the key. The more solvent you add, the lower the concentration per milliliter, while less solvent results in a higher concentration. Bacteriostatic water contains 0.9% benzyl alcohol, which only helps preserve the solution for longer times.

Example:When you add 2 ml of BAC water to the BPC-157 (5 mg powder vial), the peptide will be less concentrated than if you only add 1 mL. Hence, enter 2 mL in the calculator.

Next, select the amount of peptide you want to take per dose, measured in micrograms (mcg). This is the desired dosage that your research protocol or medical advice states.

Common choices include:

50mcg
100mcg
250mcg
500mcg

The correct dose ensures you get the intended amount of peptide in each injection. The calculator will use this dose to determine how much liquid you need to draw into your syringe.

Example:Your protocol calls for a 250mcg dose. Select/Enter 250 mcg. Always double-check that the dose unit (mcg) matches what you enter in the calculator to avoid errors

📌 Unit Reminder 1 mg = 1,000 mcg | Vials are sold in mg | Doses are taken in mcg If your protocol says '0.25 mg', enter 250 mcg in the calculator.

Based on this BPC-157 example (5 mg vial + 2 mL water + 250 mcg dose), The calculator instantly displays:

Exact syringe units: 10 units
This is exactly how far you pull the plunger on your 1 mL syringe.
Number of doses per vial: 20 doses
You have enough doses for 20 injections.

Disclaimer: This calculator is for research and educational purposes only. Always cross-reference your calculated draw volume against your Certificate of Analysis (COA) and verify your measurements before proceeding.

Peptide Dosage Calculator

Our peptide dosing calculator instantly solves dosage, reconstitution protocol, BAC water ratio, and syringe unit values and tells you precisely how many units (mg, mcg, or milliliters) to draw for each injection or application. Built on standardized reconstitution formulas used by researchers worldwide.

What the Calculator Solves Instantly?

Exact syringe draw units (e.g., draw to 10 units on a U-100 syringe)
Number of doses per vial (so you know your supply timeline)
Days of supply (based on your injection frequency)
Concentration per unit (mcg per unit of syringe)

Who Uses a Peptide Reconstitution Calculator?

Accurate peptide calculations are important for research protocols, clinical applications, compounding workflows, and educational reference purposes.

User Type	Primary Need	Most Common Peptides
Research Scientists	Accurate concentration for lab protocols	BPC-157, TB-500, IGF-1 LR3
Clinical Professionals	Patient dosing precision and reproducibility	Semaglutide, Tirzepatide, Sermorelin
Wellness Enthusiasts	Personal protocol consistency	BPC-157, CJC-1295, Ipamorelin
Fitness Researchers	Performance and recovery optimization	GHRP-6, Hexarelin, PEG-MGF
Anti-Aging Clinics	GH secretagogue dosing	Sermorelin, CJC-1295 No DAC

Correct Peptide Reconstitution

Peptide reconstitution is the process of mixing a lyophilized peptide with a liquid solvent to create a usable solution for infection. Most peptides are supplied as lyophilized (that is, freeze-dried powder). It improves stability of amino acid chain structure during storage and transport of vials. To use them, you must "reconstitute" them. Here are brief clinical reconstitution guidelines for tirzepatide, semaglutide, or any other therapeutics.

Choose the right solvent.

Choose bacteriostatic water for multi-dose vials, as its 0.9% benzyl alcohol helps inhibit microbial growth. Use sterile water when no preservative is needed, or select 0.1% acetic acid, dilute HCl, or another suitable solvent based on the peptide's properties and intended use.

Solvent ratio

Adding little or more water results in high or low concentrations, respectively.

Less water = stronger concentration.
More water = easier measurement for smaller doses.

Remember to follow the manufacturer's instructions, as the process may vary depending on the peptide.

The Drip & Swirl: The Drip technique is to add the solvent slowly, dropwise, against the glass wall of the vial. Avoid spraying directly onto the lyophilized powder.

Gently Swirl: Do not shake or vortex. Shaking can cause foaming and degrade the delicate peptide chains.

Storage & Stability:

Lyophilized powders are short-term and stable at room temperature for several weeks. Store in the freezer at -20°C (-4°F). Once reconstituted, store at 2-8°C (36-46°F), and use within 28 days.

Avoid freeze-thaw cycles as they can cause damage to Peptide.

Peptides should maintain their potency and viability for lab experiments, so proper reconstitution and storage protocols are essential.

Peptide Dosage Reference Guide

Before you can mix anything, you must understand the language of the equipment. Confusion between units, particularly mg and mcg, is the single most common source of dosing error in peptide research.

Milligrams (mg): How peptides are sold (e.g., a 5mg vial or a 10mg vial).
Micrograms (mcg): How protocols are measured. (1 mg = 1,000 mcg).
Milliliters (mL) / CC: The volume of water you add.
Units (IU): The tiny tick marks on your syringe. (100 Units = 1 mL).

Content Based on these Sources 1, 2, 3, 4

Peptide mixing calculator ratio

Use this table for a quick check when preparing a standard 250 mcg dose.

Vial Size	BAC Water Added	Concentration (mcg/unit)	Units to Draw
2 mg	1 mL	20 mcg / unit	12.5 units
5 mg	1 mL	50 mcg / unit	5 units
5 mg	2 mL	25 mcg / unit	10 units
5 mg	3 mL	16.7 mcg / unit	15 units
10 mg	2 mL	50 mcg / unit	5 units
10 mg	5 mL	20 mcg / unit	12.5 units

Peptide cheat sheet

This cheat sheet guide summarizes typical dosage ranges, applications, and common ratios. This applies to several popular peptides used in research and therapy. Always consult a healthcare professional before use.

Peptide	Typical Dose Range	Primary Application	Common Vial Sizes
BPC-157	250–500 mcg (Daily)	Tissue repair & recovery	5 mg, 10 mg
Tirzepatide	2.5–15 mg (Weekly)	Metabolic health research	20 mg
CJC-1295 (No DAC)	100–200 mcg (Daily)	Growth hormone release	2 mg, 5 mg
Sermorelin	500–1000 mcg (Daily)	GH stimulation	2 mg, 5 mg

For informational and research purposes only.

Peptide Calculator: Common Errors & Corrections

The Mistake	What Happens	The Simple Fix
Mixing up mg and mcg	You confuse milligrams with micrograms. Typing "5" instead of "5,000" causes a massive under-dose or over-dose.	Remember that 1 mg = 1,000 mcg. Always match your input numbers to the specific unit requested by the calculator field.
Wrong Syringe Type	You use a U-40 or U-50 syringe with a calculator that is calibrated for a standard U-100 syringe, leading to the wrong fluid volume.	Check your syringe box before starting. If it does not say U-100, make sure to adjust the syringe type dropdown in your settings.
The "Mystery Vial"	You forget your specific dilution ratio after a few days, turning future protocol draws into complete guesswork.	Use a waterproof marker or label the vial the exact moment you mix it. Write down the date and the exact amount of water added.
Ignoring "Dead Space"	You wonder why your vial runs out half a dose early. A tiny fraction of liquid naturally gets trapped in the needle hub with every draw.	Accept this as normal physical waste. If your final dose comes up slightly short after 20 successful draws, your math was fine—it is just physical fluid loss.

Rizwan

Brand Designer & Web Developer

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Sarrah Jee

RN (Registered Nurse), Researcher, Content Reviewer & Creator

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Frequently Asked Questions

What is a peptide?

A peptide is actually a building block of proteins, made up of short chains of 2 to 50 amino acids. These amino acids are bound together by covalent peptide bonds. They found in the body naturally, crucial for various biological functions, including hormone regulation, immune response, aging, weight loss, and healing.

What is peptide reconstitution?

Peptide reconstitution is the process of mixing a lyophilized peptide with a solvent to prepare it for injection. As they shipped as dry powder before use, it is crucial to reconstitute them. Accurate dosing depends on the right mix. Adding more or less bacteriostatic water changes the strength of the solution and the amount you need to draw.

Are peptides steroids?

No, peptides are not steroids. Peptides are short chains of amino acids naturally produced in our body. They can have various therapeutic benefits for the body, while steroids are synthetic drugs made of fat-soluble organic molecules that mimic the effects of hormones in the body. Steroids can have harmful side effects when used improperly.

Peptides send signals to specific receptors in your body. This stimulates natural reactions that aid in healing, restoring balance, and improving overall performance. This is why many people choose peptides as a natural and targeted way to improve their health and feel their best.

What is peptide therapy?

Peptide therapy is a medical treatment that uses these specific amino acid chains to help your body heal, restore balance, or optimize its performance. For example,

GLP-1 Peptides (like semaglutide): Used for blood sugar management and major weight loss.
Healing Peptides (like BPC-157 or AOD-9604): Used by athletes and patients to repair joints, heal injuries, and build lean muscle.

What are peptides used for?

Peptides are short chains of amino acids (the building blocks of proteins) that act as messengers in the body. They tell your cells exactly what to do. Because they are so targeted, they are used for a wide variety of goals, including:

Weight Loss & Blood Sugar Control ( like Semaglutide or Tirzepatide ).
Muscle Growth & Fat Loss ( by stimulating growth hormone production ).
Anti-Aging & Skin Repair ( boosting collagen production ).
Injury Healing ( repairing tissues, joints, and muscles faster ).

How to calculate peptide dosage?

To calculate peptide dosage, you must determine how many micrograms of the peptide are contained within a single unit or tick mark on an insulin syringe. It requires three values: the peptide amount in the vial, the volume of BAC water added, and your target dose.

First, determine the concentration of your solution using this formula:

Strength per Syringe Unit = \frac{Total Peptide Quantity (mcg)}{Total Volume of BAC Water (Units)}

Once you know the concentration, calculate your syringe draw amount:

Your Syringe Pull (Units) = \frac{Your Target Dose (mcg)}{Strength per Syringe Unit}

Example:

Suppose you have a 5 mg vial of a peptide (e.g., Tirzepatide) and mix it with 2 mL (200 units) of Bacteriostatic Water. Your goal is to inject a target dose of 250 mcg.

Step 1: Convert units

5 mg = 5,000 mcg

2 mL = 200 syringe units (since 1 mL = 100 units)

Step 2: Calculate strength per syringe unit

Strength per Unit= 5,000 mcg ÷ 200 units = 25 mcg per unit

Step 3: Calculate syringe draw volume for target dose

Syringe Pull (units)=250 mcg ÷ 25 mcg = 10 units

Result:Draw your U-100 insulin syringe to the 10-unit mark to obtain a 250 mcg dose.

This formula helps you calculate the exact syringe measurement needed based on your peptide amount, water volume, and desired dose.

Can I use sterile water instead of bacteriostatic water?

If your vial will be used more than once over days or weeks, bacteriostatic water is required. Sterile water is only appropriate if you plan to use the entire vial in a single session.

What is the difference between mg and mcg?

The difference comes down to size. Both measure weight, but "mg" stands for "milligram" and "mcg" stands for "microgram." A milligram (mg) is much bigger than a microgram (mcg). Specifically, 1 mg = 1,000 mcg. Most peptide vials are measured in mg, but doses are taken in mcg.

Why is my solution cloudy after mixing?

A cloudy solution usually indicates incomplete dissolution or peptide degradation. This happens if the water was injected too rapidly (crushing the delicate peptide chains), the vial was shaken instead of gently swirled, or the solution's pH level is off.

Researcher Note: If the cloudiness does not clear up after letting the vial sit in the refrigerator for a few hours, the structural integrity of the peptide may be compromised, and it should not be used.

What if I added too much water by accident?

Don't panic you have not ruined the peptide itself. The total milligrams of medicine in the vial remain exactly the same; you have simply diluted the concentration. This means you will just need to draw a larger volume of liquid into your syringe to get your exact target dose.

Researcher Note:

To adjust your math seamlessly without making a mistake, simply input the new, higher volume of water into our Peptide Reconstitution Calculator to find your updated syringe unit marker.

Can I reconstitute two peptides in the same vial?

No, this is highly discouraged. Mixing two distinct peptide powders into a single vial can cause them to bind to each other, altering their chemical structures and rendering them ineffective. It also makes precise, independent dosage adjustments impossible.

Researcher Note:

Always reconstitute and store your peptides in separate vials. If your protocol requires taking them at the same time, you can safely draw them into the same syringe right before injecting, but they must never live in the same storage vial.

Peptide Calculator dosage Report

Result

0.0 units

For a dose of 0 mcg

Draw to 0.0 units

Doses / vial: 0

Days of supply: 0

Verification Audit: Reviewed by Editorial Board Compliance Layer. Verified for Research Use Only. Re-verify math protocols before administration.

Sarrah Jee

RN (Registered Nurse), Researcher, Content Reviewer & Creator

Sarrah Jee is Registered Nurse (RN) with 18 years of frontline field experience as a Clinical and Charge Nurse, holding a BSN from a prestigious College of Nursing.She believes that medical math requires absolute precision. So, she combined her extensive clinical background with a Dual Master’s Degree in Linguistics from IUB University.

Peptide Calculator

1 Syringe Size

2 Peptide Vial Quantity

3 Bacteriostatic Water

4 Desired Dose

Result

Draw to 0.0 units

How to Use the Peptide Calculator