Liver & pancreas

Cholinesterase unit converter

Enzyme made in the liver (pseudocholinesterase)

Also known as: Pseudocholinesterase, Butyrylcholinesterase, BChE, Serum cholinesterase, CHE, Cholinestérase

Converter

Enter a value in any unit and all other units fill in.

µkat/L U/L

Worked example

4800 U/L (middle of the reference range) = 80 µkat/L

Conversion formulas

µkat/L	µkat/L = U/L × 0.01667	U/L = µkat/L × 60

Good to know

Serum cholinesterase (pseudocholinesterase) is an enzyme activity, reported in U/L or in µkat/L.

µkat/L × 60 = U/L.
Values depend strongly on the method, so ranges from different laboratories are often not comparable.

Reference range

Unit	Adults
µkat/L	51.67 – 108.3
U/L	3100 – 6500

Source: MedlinePlus (NLM): Cholinesterase - blood · Last reviewed: 2026-10-17

Note from the source: Typically 3100-6500 U/L; values depend on the method, and an individual baseline makes the test more informative (MedlinePlus)

Frequently asked questions

How do I convert Cholinesterase from U/L to µkat/L?

µkat/L = U/L × 0.01667. In the other direction: U/L = µkat/L × 60.

What is the reference range of Cholinesterase?

For adults the range is 3100 – 6500 U/L (MedlinePlus (NLM): Cholinesterase - blood). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Cholinesterase?

Common units are µkat/L, U/L.