Quick Dosing Calculator
Fast lookup for compound-specific dosing guidance, reconstitution ratios, and primary literature across the most used peptides.
| Dose (mg) | Volume to Draw | |
|---|---|---|
25.0 | 0.25 mL | Low |
50.0 | 0.50 mL | Low |
100.0 | 1.00 mL | Typical |
150.0 | 1.50 mL | Typical |
200.0 | 2.00 mL | High |
| Dose (mg) | Volume to Draw | |
|---|---|---|
0.9 | 0.27 mL | Low |
1.8 | 0.55 mL | Low |
3.6 | 1.09 mL | Typical |
5.4 | 1.64 mL | Typical |
7.2 | 2.18 mL | High |
| Dose (mg) | Volume to Draw | |
|---|---|---|
0.1 | 0.03 mL | Low |
0.3 | 0.05 mL | Low |
0.5 | 0.10 mL | Typical |
0.8 | 0.15 mL | Typical |
1.0 | 0.20 mL | High |
Note: Always consult with a healthcare professional before adjusting dosages. This reference table is for informational purposes only and should not replace medical advice.
Quick Navigation
Quick Reference: Common Peptide Doses
Based on standard 2mL reconstitution. Adjust calculations if using different water volumes.
| Peptide | Vial | BAC Water | Dose | Units to Draw |
|---|---|---|---|---|
| Semaglutide | 5mg | 2mL | 0.25mg | 10 units |
| Semaglutide | 5mg | 2mL | 0.5mg | 20 units |
| Semaglutide | 5mg | 2mL | 1mg | 40 units |
| Tirzepatide | 10mg | 2mL | 2.5mg | 25 units |
| Tirzepatide | 10mg | 2mL | 5mg | 50 units |
| BPC-157 | 5mg | 2mL | 250mcg | 10 units |
| BPC-157 | 5mg | 2mL | 500mcg | 20 units |
| TB-500 | 5mg | 2mL | 2.5mg | 100 units (1mL) |
Insulin Syringe Reading Guide
Syringe Sizes Explained
- 100-unit (1mL): Best for TB-500, larger GLP-1 doses. Each line = 2 units.
- 50-unit (0.5mL): Ideal for most peptides. Each line = 1 unit. More precise.
- 30-unit (0.3mL): For very small doses under 15 units. Maximum precision.
Understanding Units
Insulin syringe “units” are just volume measurements: 100 units = 1mL = 1cc. The term “units” comes from insulin dosing but has no relation to peptide potency. Think of units as hundredths of a milliliter.
Reconstitution Matters
Standard is 2mL BAC water per vial. Using 1mL doubles concentration (half the units needed). Using 3mL reduces concentration (more units needed). Always record your reconstitution volume on the vial.
Reading the Meniscus
Liquid in a syringe curves slightly (meniscus). Read from the bottom of the curve, where it touches the syringe wall. Hold syringe at eye level for accurate reading. Small bubbles do not affect accuracy—just avoid large air gaps.
Frequently Asked Questions
How many units is 0.25mg semaglutide?
With a 5mg vial reconstituted with 2mL bacteriostatic water, 0.25mg semaglutide equals 10 units on an insulin syringe. Each unit contains 0.025mg. This is the standard starting dose for semaglutide therapy.
How many units is 0.5mg semaglutide?
Using a 5mg vial with 2mL reconstitution, 0.5mg semaglutide equals 20 units. This is typically the dose at weeks 5-8 of escalation. If using a different vial size or water volume, recalculate using: units = (dose in mg ÷ concentration) × 100.
How many units should I draw for BPC-157?
For a 5mg BPC-157 vial reconstituted with 2mL water: 250mcg = 10 units, 500mcg = 20 units. Most protocols use 250-500mcg once or twice daily. For injury protocols, 500mcg twice daily (40 units total) is common.
What size insulin syringe for peptides?
Most peptide users prefer 0.5mL (50 unit) or 1mL (100 unit) insulin syringes with 29-31 gauge needles. The 0.5mL size offers more precise measurement for small doses (under 25 units). Use 1mL syringes for larger doses or TB-500 which often requires 50-100 units.
How do I read an insulin syringe for peptides?
Insulin syringes are marked in "units" where 100 units = 1mL. Each small line on a 100-unit syringe represents 2 units. On a 50-unit syringe, each line represents 1 unit. Draw medication to the line corresponding to your calculated units. The bottom of the meniscus should touch the line.
Does reconstitution amount affect dose calculation?
Yes, critically. If you add 2mL water to a 5mg vial, concentration is 2.5mg/mL (0.025mg per unit). If you add 1mL, concentration doubles to 5mg/mL (0.05mg per unit). Always know your reconstitution volume—incorrect assumptions cause dosing errors. Standard is 2mL for most peptides.
Quick Formula
For any peptide with standard 2mL reconstitution:
Example: 0.5mg semaglutide from 5mg vial = (0.5 × 2 × 100) ÷ 5 = 20 units