【How-to】What are insulin syringes calibrated in

20 mL: This syringe is calibrated in 1 mL increments with larger markings at the zero (0), 5 mL, 10 mL, 15 mL, and 20 mL levels. A 20 mL syringe is generally used when mixing larger volumes of medication, to administer large volumes of IV push medications, and for irrigations.