Drugs & toxicology

Theophylline unit converter

Bronchodilator drug level (therapeutic range)

Also known as: Aminophylline, Teofilina, Teofillina, Theo-24, Theo-Dur, Uniphyllin

Converter

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

mg/L µmol/L mg/dL µg/dL

Worked example

15 mg/L (middle of the reference range) = 83.3 µmol/L

Conversion formulas

µmol/L	µmol/L = mg/L × 5.551	mg/L = µmol/L × 0.1802
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	10 – 20
µmol/L	55.51 – 111
mg/dL	1 – 2
µg/dL	1000 – 2000

Source: Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011 · Last reviewed: 2026-10-14

Note from the source: 10-20 mg/L. UK Pathology Harmony consensus of the Association for Clinical Biochemistry, the Institute of Biomedical Science and the Royal College of Pathologists.

Frequently asked questions

How do I convert Theophylline 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 Theophylline?

For adults the range is 10 – 20 mg/L (Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Theophylline?

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