Warfarin unit converter
Warfarin level in serum or plasma (drug monitoring; antikoagulation)
Converter
Enter a value in any unit and all other units fill in.
Worked example
10 µmol/L = 3.08 µg/mL
Conversion formulas
| µmol/L | µmol/L = µg/mL × 3.244 | µg/mL = µmol/L × 0.3083 |
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Good to know
Warfarin is reported in µg/mL or µmol/L. The page converts between the units only.
- µmol/L × 0.3083 = µg/mL (exact factor 0.3083).
- No established reference range is listed here; compare your result only with the range printed on your own report.
Reference range
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Source: PubChem: Warfarin · Last reviewed: 2026-10-19
Note from the source: No established reference range; the page converts units only. Mass-to-amount conversion uses a molar mass of 308.3 g/mol. Drug levels must be interpreted by the treating team; this is not a dosing recommendation.