Drugs & toxicology

Valproic acid unit converter

Anti-seizure drug level (therapeutic range)

Also known as: Valproate, Sodium valproate, Divalproex, VPA, Valproat, Acide valproïque

Converter

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

mg/L µmol/L mmol/L mg/dL µg/dL

Worked example

75 mg/L (middle of the reference range) = 520 µmol/L

Conversion formulas

µmol/L	µmol/L = mg/L × 6.934	mg/L = µmol/L × 0.1442
mmol/L	mmol/L = mg/L × 0.006934	mg/L = mmol/L × 144.2
mg/dL	mg/dL = mg/L × 0.1	mg/L = mg/dL × 10
µg/dL	µg/dL = mg/L × 100	mg/L = µg/dL × 0.01

Reference range

Unit	Adults
mg/L	50 – 100
µmol/L	346.7 – 693.4
mmol/L	0.3467 – 0.6934
mg/dL	5 – 10
µg/dL	5000 – 10 000

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

Note from the source: Usually accepted therapeutic range 50-100 mcg/mL (total, trough); thrombocytopenia risk rises above 110 (women) and 135 (men) mcg/mL (FDA label)

Frequently asked questions

How do I convert Valproic acid from mg/L to mg/dL?

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

What is the reference range of Valproic acid?

For adults the range is 50 – 100 mg/L (FDA drug label (DailyMed): valproic acid). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Valproic acid?

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