How do I convert Phenytoin from µmol/L to mg/L?

mg/L = µmol/L × 0.2523. For example, 60 µmol/L equals 15.1 mg/L.

How many mg/L are 60 µmol/L?

60 µmol/L equal 15.1 mg/L (Phenytoin).

Drugs & toxicology

mg/L = µmol/L × 0.2523

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

µmol/L mg/L

µmol/L → mg/L	mg/L = µmol/L × 0.2523
mg/L → µmol/L	µmol/L = mg/L × 3.964

Highlighted: values inside the adult reference range.

39.64 – 79.28 µmol/L = 10 – 20 mg/L

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