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Reading the Insulin Syringe (Units vs mL)
A U-100 insulin syringe is marked in "units," not milliliters. On a U-100 scale, 100 units equals 1 mL, so 1 unit equals 0.01 mL. The entire barrel of a 1 mL syringe runs from 0 to 100 units. This is the single most useful fact for dosing. Convert your injecti
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- A U-100 insulin syringe is marked in "units," not milliliters. On a U-100 scale, 100 units equals 1 mL, so 1 unit equals 0.01 mL. The entire barrel of a 1 mL syringe runs from 0 to 100 units.
- This is the single most useful fact for dosing. Convert your injection volume to units by multiplying mL by 100:
- Syringe units = injection volume (mL) × 100
- So 0.03 mL draws to the 3-unit line. 0.05 mL draws to 5 units. You never have to eyeball a partial milliliter.