Toxicology and drug-level results are reported in different units by different laboratories and countries, and a unit mix-up can change how urgent a result looks. These converters use the molar mass of each substance so you can compare results reported in mmol/L and mg/dL.
Converters in This Group
| Test | mmol/L → mg/dL factor | Convert | Reverse |
|---|---|---|---|
| Ethanol | × 4.607 | Ethanol mmol/L to mg/dL | Ethanol mg/dL to mmol/L |
| Ethylene Glycol | × 6.207 | Ethylene Glycol mmol/L to mg/dL | Ethylene Glycol mg/dL to mmol/L |
| Vancomycin | × 144.9 | Vancomycin mmol/L to mg/dL | Vancomycin mg/dL to mmol/L |
To convert mg/dL to mmol/L, divide by the same factor.
About These Tests
Ethanol
Blood alcohol. 17.4 mmol/L equals 80 mg/dL (0.08%), a common legal driving limit.
Ethylene Glycol
The toxic alcohol in antifreeze. Levels of 20 mg/dL (3.2 mmol/L) or higher have traditionally prompted treatment.
Vancomycin
An antibiotic monitored in blood, usually reported in mg/L (the same as µg/mL): 1 mg/L = 0.1 mg/dL.
How the Factors Are Calculated
Each factor is the molar mass of the substance (g/mol) divided by 10. Factors were last verified on 24 September 2026. Read more in our editorial policy.
Sources
- Barceloux DG et al. American Academy of Clinical Toxicology practice guidelines on the treatment of ethylene glycol poisoning. J Toxicol Clin Toxicol 1999;37:537–560.
- IUPAC Commission on Isotopic Abundances and Atomic Weights. Standard atomic weights (used for all molar masses).
Reference ranges vary between laboratories. Use the range printed on your own report and discuss results with your doctor.