Drugs & toxicology

Ethosuximide unit converter

Anticonvulsant drug level used mainly for absence seizures

Also known as: Zarontin, ESM

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

70 µg/mL (middle of the reference range) = 496 µmol/L

Conversion formulas

µmol/L	µmol/L = µg/mL × 7.084	µg/mL = µmol/L × 0.1412
mmol/L	mmol/L = µg/mL × 0.007084	µg/mL = mmol/L × 141.2
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	40 – 100
µmol/L	283.3 – 708.4
mmol/L	0.2833 – 0.7084
mg/dL	4 – 10
µg/dL	4000 – 10 000

Source: FDA drug label (DailyMed): ethosuximide · Last reviewed: 2026-10-14

Note from the source: Therapeutic range of serum levels 40-100 mcg/mL (FDA label)

Frequently asked questions

How do I convert Ethosuximide 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 Ethosuximide?

For adults the range is 40 – 100 µg/mL (FDA drug label (DailyMed): ethosuximide). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Ethosuximide?

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