Urine & CSF

Lactate dehydrogenase (CSF) unit converter

LDH activity in cerebrospinal fluid

Also known as: CSF LDH, Liquor-LDH, LDH im Liquor

Converter

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

µkat/L U/L

Worked example

20 U/L (middle of the reference range) = 0.333 µkat/L

Conversion formulas

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

Good to know

LDH in cerebrospinal fluid is an enzyme activity, reported in U/L or in µkat/L.

µkat/L × 60 = U/L.
Blood in the sample raises the value falsely; see the other CSF results.

Reference range

Unit	Adults
µkat/L	0 – 0.6667
U/L	0 – 40

Source: MedlinePlus (NLM): CSF analysis · Last reviewed: 2026-10-19

Note from the source: Below 40 U/L (MedlinePlus); higher in bacterial than in viral meningitis

Frequently asked questions

How do I convert Lactate dehydrogenase (CSF) 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 Lactate dehydrogenase (CSF)?

For adults the range is 0 – 40 U/L (MedlinePlus (NLM): CSF analysis). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Lactate dehydrogenase (CSF)?

Common units are µkat/L, U/L.