milligrams er (DESS-ih-lee-tur), a unit of measure that shows the concentration of a substance in a specific amount of fluid. In the United States, blood glucose test results are reported as mg/dL. Medical journals and other countries use millimoles per liter (mmol/L ). To convert to mg/dL from mmol/L, multiply mmol/L by 18. Example: 10 mmol/L × 18 = 180 mg/dL.