Drugs & toxicology

Levetiracetam unit converter

Anticonvulsant drug level for therapeutic drug monitoring

Also known as: Keppra, LEV

Converter

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

µg/mL µmol/L mmol/L mg/dL µg/dL

Worked example

29 µg/mL (middle of the reference range) = 170 µmol/L

Conversion formulas

µmol/L	µmol/L = µg/mL × 5.875	µg/mL = µmol/L × 0.1702
mmol/L	mmol/L = µg/mL × 0.005875	µg/mL = mmol/L × 170.2
mg/dL	mg/dL = µg/mL × 0.1	µg/mL = mg/dL × 10
µg/dL	µg/dL = µg/mL × 100	µg/mL = µg/dL × 0.01

Reference range

Unit	Adults
µg/mL	12 – 46
µmol/L	70.5 – 270.3
mmol/L	0.0705 – 0.2703
mg/dL	1.2 – 4.6
µg/dL	1200 – 4600

Source: Reference ranges for antiepileptic drugs revisited (ILAE ranges), Drug Des Devel Ther 2018 · Last reviewed: 2026-10-14

Note from the source: ILAE 2008 range 12-46 mg/L (70-270 µmol/L); the Norwegian national range is 5-41 mg/L

Frequently asked questions

How do I convert Levetiracetam from µg/mL to mg/dL?

mg/dL = µg/mL × 0.1. In the other direction: µg/mL = mg/dL × 10.

What is the reference range of Levetiracetam?

For adults the range is 12 – 46 µg/mL (Reference ranges for antiepileptic drugs revisited (ILAE ranges), Drug Des Devel Ther 2018). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Levetiracetam?

Common units are µg/mL, µmol/L, mmol/L, mg/dL, µg/dL.