Units per milliliter (U/mL)
The results of some medical tests are reported in units per milliliter (U/mL).
- A unit is an arbitrary amount agreed upon by scientists and doctors.
- A milliliter is a unit of fluid volume equal to one-thousandth of a liter. A liter is slightly larger than a quart.
Current as of: May 1, 2026
Author:
WebMD Ignite Staff
Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.