Drugs & toxicology

Nortriptyline unit converter

Tricyclic antidepressant (also the active metabolite of amitriptyline)

Also known as: Pamelor, Aventyl

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

100 ng/mL (middle of the reference range) = 380 nmol/L

Conversion formulas

nmol/L	nmol/L = ng/mL × 3.797	ng/mL = nmol/L × 0.2634
µmol/L	µmol/L = ng/mL × 0.003797	ng/mL = µmol/L × 263.4
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 – 150
nmol/L	189.8 – 569.5
µmol/L	0.1898 – 0.5695
µg/dL	5 – 15
ng/dL	5000 – 15 000

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

Note from the source: Optimum plasma range 50-150 ng/mL when doses above 100 mg daily are used (FDA label)

Frequently asked questions

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

nmol/L = ng/mL × 3.797. In the other direction: ng/mL = nmol/L × 0.2634.

What is the reference range of Nortriptyline?

For adults the range is 50 – 150 ng/mL (FDA drug label (DailyMed): nortriptyline). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Nortriptyline?

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