Insulin syringes are marked in units on the U-100 scale: 100 units = 1 mL. A 1 mL insulin syringe has 100 markings; a 0.5 mL has 50; a 0.3 mL has 30 (often with half-unit ticks). Read the level from the top of the plunger, not from the tip. Tap out bubbles before dispensing.
Guide
How to use an insulin syringe
Compiled and maintained by the BACwater.ai editorial team and checked against the sources cited on this page. This is general research information, not a medical review. Last updated July 2026.
Ready to build a plan?
Turn what you just learned into an exact reconstitution plan.
Also worth reading
- GuideFree printable peptide vial labels
Generate printable vial labels with a QR code showing strength, concentration, dose, mix date, and discard date.
- Peptide GuideBPC-157 bac water calculator & guide
BPC-157 is a synthetic peptide derived from a protein found in gastric juice, studied in research settings for tissue repair and recovery.
- Peptide GuideTB-500 bac water calculator & guide
TB-500 is a synthetic fragment of the protein Thymosin Beta-4, studied in research for tissue repair and flexibility.
- Peptide GuideIpamorelin bac water calculator & guide
Ipamorelin is a lab-made peptide. It is a growth hormone secretagogue, which means it is studied for gently nudging the body's own growth-hormone signals.