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Units per liter (U/L)

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By Jeannette Curtis; Caroline Rea, RN, BS, MS

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The results of some medical tests are reported in units per liter (U/L).

  • A unit is an arbitrary amount agreed upon by scientists and doctors.
  • A liter is a measure of volume that is slightly larger than a quart.
  • A kilo unit is one thousand units. It is written kU/L. Some medical tests are reported using this standard international unit (SI unit).
Author:Jeannette Curtis
Caroline Rea, RN, BS, MS
Medical Review:
Last Updated: 05/25/2007