🧫 Creatinine Converter (mg/dL ↔ µmol/L)
Serum creatinine in mg/dL × 88.42 gives µmol/L; µmol/L ÷ 88.42 gives mg/dL — this converts either direction exactly. Enter your values below — results update instantly, entirely on your device.
1 mg/dL × 88.42
How the creatinine converter (mg/dl ↔ µmol/l) works
µmol/L = mg/dL × 88.42, and mg/dL = µmol/L ÷ 88.42. The factor 88.42 comes from creatinine’s molar mass of 113.12 g/mol: 1 mg/dL is 10 mg/L, which is 10 ÷ 113.12 = 0.0884 mmol/L = 88.42 µmol/L.
Example: 1.0 mg/dL × 88.42 = 88 µmol/L, and a lab value of 80 µmol/L ÷ 88.42 = 0.90 mg/dL.
Serum creatinine is reported in mg/dL in the US and in µmol/L in the UK, Canada, Australia and most of Europe. The exact factor 88.42 is derived from creatinine’s molar mass, so no precision is lost. Note this converts the creatinine concentration only — it does not compute eGFR (kidney function), which additionally requires age and sex. This tool is a unit conversion, not medical advice or a kidney-function assessment; discuss results with your clinician.
Frequently asked questions
How do I convert creatinine from mg/dL to µmol/L?
Multiply by 88.42. For example, 1.2 mg/dL × 88.42 = 106 µmol/L. To convert back, divide the µmol/L value by 88.42.
Where does 88.42 come from?
From creatinine’s molar mass of 113.12 g/mol. One mg/dL equals 10 mg/L, and 10 ÷ 113.12 = 0.0884 mmol/L, which is 88.42 µmol/L — so 1 mg/dL = 88.42 µmol/L.
Does this calculate eGFR or kidney function?
No. This converts the creatinine number between units only. Estimated GFR (eGFR) needs more inputs such as age and sex and a specific equation (e.g. CKD-EPI); this tool deliberately does just the unit conversion.
Is 88.4 or 88.42 the right factor?
They are the same value rounded differently. The molar-mass-derived factor is 88.42, which this tool uses; many references round it to 88.4.
Is my data uploaded?
No — the conversion runs locally in your browser and nothing is transmitted.
Is this creatinine converter (mg/dl ↔ µmol/l) accurate and private?
Yes. It uses the standard published formula, shows its working under every result, and computes locally in your browser — your inputs are never sent to a server, and the page works offline.