Creatinine — mg/dL to µmol/L

In short To convert creatinine from mg/dL to µmol/L, multiply by 88.4033 — so one mg/dL is 88.4033 µmol/L, and one µmol/L is 0.0113118 mg/dL. 0.8 mg/dL is 71 µmol/L; 1.0 mg/dL is 88 µmol/L; 1.5 mg/dL is 133 µmol/L. The factor comes from the molar mass, because creatinine has a molar mass of 113.12 g/mol; that is why it differs for every analyte and why a single "lab unit converter" factor does not exist. Creatinine is the one where the two systems look most alarmingly different — 1.0 mg/dL and 88 µmol/L are the same result, but one is a small decimal and the other is a three-figure number, and people reading their own results across systems routinely think something has gone badly wrong. Note the SI unit here is µmol/L, a thousand times smaller than the mmol/L used for glucose. 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.