The blood glucose level is commonly expressed as

Blood glucose concentration is commonly reported as a mass concentration in milligrams per decilitre (mg/dL). Clinical laboratories and many guidelines — particularly in the United States — present glucose values as mg per 100 mL of blood, i.e., mg/dL, which directly expresses the mass of glucose in a fixed blood volume. International practice also uses molar units (mmol/L) and there are standard conversion factors between mmol/L and mg/dL, but the mass-per-volume expression mg/dL remains a standard clinical reporting unit in many settings. The other choices (mm of Hg, ppm, g/L) are not the conventional units for routine blood‑glucose reporting.