Glucose Unit Converter

In short Glucose is reported in mg/dL in some countries and mmol/L in others, and the two are related by a fixed factor: 1 mg/dL = 0.0555074 mmol/L, so to go the other way you divide by 18.0156. 70 mg/dL is 3.9 mmol/L; 100 mg/dL is 5.6 mmol/L; 126 mg/dL is 7.0 mmol/L. The factor is not arbitrary — it comes from the molar mass, because glucose has a molar mass of 180.156 g/mol, and that is why every analyte has its own factor rather than one shared conversion. This is the single most converted number in medicine, because a glucose meter bought in one country reports in the other country's units and most meters cannot be switched. The rough mental version — divide mg/dL by 18 — is accurate to within half a percent and is what people actually use at the kitchen table; the exact divisor is 18.016. This converts units. It does not interpret results, does not compare your value against a reference interval, and is not a substitute for the clinician who ordered the test — reference intervals differ between laboratories, methods and populations.