Peptide Dosing Calculator

Calculate the appropriate peptide dosage based on body weight, desired dosage, and peptide concentration to ensure accurate administration.

Body Weight Enter your body weight in the selected unit

Weight Unit

Desired Dosage Enter desired dosage in mcg/kg (micrograms per kilogram)

Peptide Concentration Enter peptide concentration in mg/ml

Syringe Size

Number of Doses Per Day How many times per day will you administer this peptide

Quick Examples:

How to Use This Calculator

Enter your body weight and select the appropriate unit (kg or lbs)
Input your desired dosage in mcg/kg (micrograms per kilogram of body weight)
Enter the concentration of your peptide solution in mg/ml
Select the syringe size you'll be using
Specify how many doses you'll take per day
Click Calculate to see your personalized dosing information

Formula Used

Total Dosage (mcg) = Body Weight (kg) × Desired Dosage (mcg/kg)

Volume to Inject (ml) = Total Dosage (mcg) ÷ (Peptide Concentration (mg/ml) × 1000)

Syringe Units = Volume to Inject (ml) × Syringe Size (units/ml)

Where:

Body Weight (kg) = Your weight in kilograms (if entered in lbs, converted to kg)
Desired Dosage (mcg/kg) = Recommended dosage per kilogram of body weight
Peptide Concentration (mg/ml) = Concentration of your reconstituted peptide
Syringe Size (units/ml) = Total units in your insulin syringe (typically 100 units/ml)

Example Calculation

Real-World Scenario:

A person weighing 176 lbs (80 kg) wants to administer CJC-1295 at a dosage of 100 mcg/kg twice daily. Their peptide solution has a concentration of 2 mg/ml, and they're using a 100-unit insulin syringe.

Given:

Body Weight = 176 lbs (80 kg)
Desired Dosage = 100 mcg/kg
Peptide Concentration = 2 mg/ml
Syringe Size = 100 units
Doses Per Day = 2

Calculation:

Total Dosage = 80 kg × 100 mcg/kg = 8000 mcg (8 mg)

Volume to Inject = 8000 mcg ÷ (2 mg/ml × 1000) = 4 ml

Syringe Units = 4 ml × 100 units/ml = 400 units

Units Per Dose = 400 units ÷ 2 doses = 200 units

Result: The person should draw 200 units (2 ml) in their syringe for each dose, twice daily.

Why This Calculation Matters

Practical Applications

Ensures accurate dosing for therapeutic effects
Prevents potential side effects from overdosing
Maximizes the efficiency of your peptide supply
Standardizes dosing protocols for consistent results

Key Benefits

Eliminates guesswork in peptide administration
Adapts to individual body weight for personalized dosing
Works with any peptide concentration or syringe size
Supports multiple daily dosing protocols

Common Mistakes & Tips

Peptide dosages are typically measured in micrograms (mcg), not milligrams (mg). Remember that 1 mg = 1000 mcg. Mixing these units can result in dosing errors of 1000 times the intended amount.

Insulin syringes are marked in units, not milliliters. A 100-unit syringe typically holds 1ml of liquid, meaning each unit equals 0.01ml. Always verify your syringe's total volume and unit markings before administering.

Different peptide preparations have varying concentrations. A 5mg peptide reconstituted in 1ml of water has a different concentration than a 5mg peptide reconstituted in 2ml of water. Always check your specific concentration before calculating dosage.

Frequently Asked Questions

To reconstitute peptide powder, use bacteriostatic water. The amount of water depends on your desired concentration. For example, to create a 2mg/ml solution from 5mg of peptide powder, add 2.5ml of bacteriostatic water. Always use sterile technique and store the reconstituted peptide in the refrigerator.

No, you should not use regular tap or distilled water. Peptides should be reconstituted with bacteriostatic water, which contains a small amount of benzyl alcohol (0.9%) to prevent bacterial growth. This allows the reconstituted peptide to be stored for longer periods (typically 2-4 weeks refrigerated).

When properly reconstituted with bacteriostatic water and stored in a refrigerator (2-8°C), most peptides remain stable for 2-4 weeks. Some peptides may remain stable for longer periods, but it's generally recommended to use them within this timeframe for maximum potency and safety.

References & Disclaimer

Medical Disclaimer

This calculator is for informational purposes only and is not a substitute for professional medical advice. Always consult with a qualified healthcare provider before starting any peptide therapy. Dosages may vary based on individual factors, medical conditions, and specific peptide characteristics. The creators of this calculator are not responsible for any adverse effects resulting from the use of this information.

References

Peptide Therapeutics: Current Status and Future Directions - National Center for Biotechnology Information
Therapeutic Peptides: Historical Perspectives, Current Development Trends, and Future Directions - Frontiers in Endocrinology
Peptide therapeutics: current status and future directions - Nature Reviews Drug Discovery

Accuracy Notice

This calculator provides estimates based on the information you input. Peptide dosing may need adjustment based on individual response, medical conditions, and other factors. The calculations assume standard insulin syringe measurements (100 units = 1ml). Always verify calculations with a healthcare professional before administration.

About the Author

Kumaravel Madhavan

Web developer and data researcher creating accurate, easy-to-use calculators across health, finance, education, and construction and more. Works with subject-matter experts to ensure formulas meet trusted standards like WHO, NIH, and ISO.

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health medical-clinical-calculators peptide dosing medical body weight

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