Kidney tests are where unit mistakes happen most. Creatinine and uric acid are reported in µmol/L (not mmol/L) in most SI laboratories, and urea in SI countries is not the same number as BUN in the US. Check the unit printed on your report before converting; our calculators let you switch between mmol/L and µmol/L.
Converters in This Group
| Test | mmol/L → mg/dL factor | Convert | Reverse |
|---|---|---|---|
| Serum Creatinine | × 11.31 | Serum Creatinine mmol/L to mg/dL | Serum Creatinine mg/dL to mmol/L |
| Urine Creatinine | × 11.31 | Urine Creatinine mmol/L to mg/dL | Urine Creatinine mg/dL to mmol/L |
| Urea (BUN) | × 6.006 | Urea (BUN) mmol/L to mg/dL | Urea (BUN) mg/dL to mmol/L |
| Uric Acid | × 16.81 | Uric Acid mmol/L to mg/dL | Uric Acid mg/dL to mmol/L |
| Oxalate | × 8.802 | Oxalate mmol/L to mg/dL | Oxalate mg/dL to mmol/L |
To convert mg/dL to mmol/L, divide by the same factor. For ready-made tables, see the mmol/L to mg/dL conversion charts.
About These Tests
Serum Creatinine
A muscle waste product used to estimate kidney function (eGFR). Most SI labs report µmol/L: 1 mg/dL = 88.4 µmol/L.
Urine Creatinine
Creatinine measured in urine, mainly used to correct other urine results such as the albumin-to-creatinine ratio.
Urea (BUN)
Urea is reported in mmol/L in SI countries, while US labs report blood urea nitrogen (BUN) in mg/dL. BUN (mg/dL) = urea (mmol/L) × 2.8.
Uric Acid
The end product of purine breakdown, linked to gout and kidney stones. Most SI labs report µmol/L: 1 mg/dL = 59.5 µmol/L.
Oxalate
Mostly measured in urine to assess kidney stone risk.
How the Factors Are Calculated
Each factor is the molar mass of the substance (g/mol) divided by 10. Factors were last verified on 24 September 2026. Read more in our editorial policy.
Sources
- KDIGO 2012 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney Int Suppl 2013;3:1–150.
- IUPAC Commission on Isotopic Abundances and Atomic Weights. Standard atomic weights (used for all molar masses).
Reference ranges vary between laboratories. Use the range printed on your own report and discuss results with your doctor.