Drugs & toxicology

Clozapine unit converter

Atypical antipsychotic drug level for therapeutic drug monitoring

Also known as: Clozaril, Leponex

Converter

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

ng/mL nmol/L mg/L µmol/L µg/dL

Worked example

475 ng/mL (middle of the reference range) = 1 453 nmol/L

Conversion formulas

nmol/L	nmol/L = ng/mL × 3.06	ng/mL = nmol/L × 0.3268
mg/L	mg/L = ng/mL × 0.001	ng/mL = mg/L × 1000
µmol/L	µmol/L = ng/mL × 0.00306	ng/mL = µmol/L × 326.8
µg/dL	µg/dL = ng/mL × 0.1	ng/mL = µg/dL × 10

Reference range

Unit	Adults
ng/mL	350 – 600
nmol/L	1071 – 1836
mg/L	0.35 – 0.6
µmol/L	1.071 – 1.836
µg/dL	35 – 60

Source: Therapeutic Drug Monitoring in Psychiatry (Pharmaceuticals 2024), AGNP reference ranges · Last reviewed: 2026-10-14

Note from the source: AGNP consensus reference range 350-600 ng/mL (trough); level 1 recommendation as cited in the source

Frequently asked questions

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

nmol/L = ng/mL × 3.06. In the other direction: ng/mL = nmol/L × 0.3268.

What is the reference range of Clozapine?

For adults the range is 350 – 600 ng/mL (Therapeutic Drug Monitoring in Psychiatry (Pharmaceuticals 2024), AGNP reference ranges). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Clozapine?

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