Peptide Dosing Calculations - Units, Concentration & Syringe Math

7 min read

The Basics of Peptide Dosing

Understanding peptide dosing requires knowing three key numbers: your vial size (in mg), the amount of water you add (in ml), and your desired dose (in mcg or mg).

Key Conversions

• 1 mg = 1,000 mcg (micrograms)
• 1 ml = 100 units (on an insulin syringe)

The Calculation Formula

Step 1: Calculate Your Concentration

Concentration (mcg/unit) = (Vial size in mg x 1000) / (Water added in ml x 100)

Example: 10mg vial + 2ml water = 10,000 mcg / 200 units = 50 mcg per unit

Step 2: Calculate Units to Inject

Units to inject = Desired dose (mcg) / Concentration (mcg/unit)

Example: 250mcg dose / 50 mcg/unit = 5 units

Quick Reference Examples

5mg vial + 1ml water: 250mcg = 5 units, 500mcg = 10 units. 5mg vial + 2ml water: 250mcg = 10 units, 500mcg = 20 units. 10mg vial + 2ml water: 250mcg = 5 units, 500mcg = 10 units.

Tips for Accurate Dosing

• Use more water for small doses - makes measuring easier
• Use less water for large doses - reduces injection volume
• Double-check your math - small errors add up over weeks
• Use our calculator - eliminates human error

Related Resources

• Peptide Calculator - Calculate your exact dose
• Peptide Directory - Browse all peptides
• Peptide Glossary - Look up key terms
• FAQ - Common questions answered
• All Guides - Browse all educational guides