Drugs & toxicology

Citalopram unit converter

SSRI antidepressant drug level for therapeutic drug monitoring

Also known as: Celexa

Converter

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

ng/mL nmol/L µmol/L µg/dL ng/dL

Worked example

80 ng/mL (middle of the reference range) = 247 nmol/L

Conversion formulas

nmol/L	nmol/L = ng/mL × 3.083	ng/mL = nmol/L × 0.3244
µmol/L	µmol/L = ng/mL × 0.003083	ng/mL = µmol/L × 324.4
µg/dL	µg/dL = ng/mL × 0.1	ng/mL = µg/dL × 10
ng/dL	ng/dL = ng/mL × 100	ng/mL = ng/dL × 0.01

Reference range

Unit	Adults
ng/mL	50 – 110
nmol/L	154.1 – 339.1
µmol/L	0.1541 – 0.3391
µg/dL	5 – 11
ng/dL	5000 – 11 000

Source: Front Psychiatry 2023: Toward therapeutic drug monitoring of citalopram (guideline range 50-110 ng/mL) · Last reviewed: 2026-10-14

Note from the source: Therapeutic reference range of racemic citalopram 50-110 ng/mL (AGNP consensus guideline, as cited in the source); interpretation depends on the enantiomer

Frequently asked questions

How do I convert Citalopram from ng/mL to nmol/L?

nmol/L = ng/mL × 3.083. In the other direction: ng/mL = nmol/L × 0.3244.

What is the reference range of Citalopram?

For adults the range is 50 – 110 ng/mL (Front Psychiatry 2023: Toward therapeutic drug monitoring of citalopram (guideline range 50-110 ng/mL)). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Citalopram?

Common units are ng/mL, nmol/L, µmol/L, µg/dL, ng/dL.