Micromoles per Liter (umol/l) to Milligrams per Liter (mg/l) Converter
Convert pharmacological and toxicological concentrations from umol/L to mg/L. Includes a database of 50+ common drugs and toxins.
About
Therapeutic Drug Monitoring (TDM) and toxicology often require switching between molar units (umol/L) and mass units (mg/L). While chemists prefer molarity to understand stoichiometry, clinicians and pharmacists often work with mass concentrations to align with dosing guidelines (mg/kg).
This conversion is impossible without the substance's Molecular Weight (MW). For instance, a blood alcohol concentration of 21.7 mmol/L is equivalent to 100 mg/dL (0.1%), but this relationship is unique to Ethanol. This tool bridges that gap by providing a comprehensive database of pharmaceuticals, toxins, and heavy metals, allowing for instant, error-free conversion.
Formulas
To convert from a molar count (micromoles) to a physical weight (milligrams), we multiply by the molar mass and adjust the prefix.
This derivation comes from:
Since we need the result in mg (10-3 g), we divide the result by 1000.
Reference Data
| Substance | Molecular Weight | 100 umol/L converts to |
|---|---|---|
| Paracetamol (Acetaminophen) | 151.16 g/mol | 15.1 mg/L |
| Salicylic Acid (Aspirin metabolite) | 138.12 g/mol | 13.8 mg/L |
| Ethanol | 46.07 g/mol | 4.6 mg/L |
| Phenytoin | 252.27 g/mol | 25.2 mg/L |
| Theophylline | 180.16 g/mol | 18.0 mg/L |
| Lithium | 6.94 g/mol | 0.7 mg/L |
| Lead (Pb) | 207.20 g/mol | 20.7 mg/L |
| Digoxin | 780.95 g/mol | 78.1 mg/L |
| Vancomycin | 1449.30 g/mol | 144.9 mg/L |
| Cyclosporine | 1202.61 g/mol | 120.3 mg/L |