Syringe basics
Understand the difference between volume (mL), amount of drug (mg), and syringe unit markings. This page is educational and contains no medical advice.
The key distinction
- mL
- is liquid volume.
- mg
- is the amount of active ingredient.
- U-100 units
- are volume markings on an insulin syringe — not mg.
- 100 U-100 units
- = 1 mL
- 10 U-100 units
- = 0.1 mL
- 1 U-100 unit
- = 0.01 mL
Caution: U-100 syringe units are not universal medication doses. The same number of units delivers a different amount of drug at a different concentration.
Interactive converter — U-100 units ↔ mL
10U-100 units
0.1mL
Information: This converter changes volume units only. It says nothing about how much medication (mg) is in that volume — that depends entirely on your concentration. Units are not a dose.
Reference syringe types
1 mL tuberculin syringe
TUBERCULIN_ML
max 1 mLsmallest marking 0.01 mLThis syringe is marked in mL. Always confirm the required mL with a clinician or pharmacist.
U-100 insulin syringe
U100_INSULIN
max 1 mLsmallest marking 0.01 mLOn a U-100 insulin syringe, units are volume markings. 100 units = 1 mL, 10 units = 0.1 mL, 1 unit = 0.01 mL. Units are not mg.