How do I convert Oxalate (spot urine) from mg/L to mmol/L?

mmol/L = mg/L × 0.01111. In the other direction: mg/L = mmol/L × 90.03.

Urine & CSF

Oxalate (spot urine) unit converter

Oxalate in spot urine (hyperoxaluria in children)

Also known as: Oxalat (Spontanurin)

Enter a value in any unit and all other units fill in.

mmol/L mg/L

1 mmol/L = 90 mg/L

mmol/L	mmol/L = mg/L × 0.01111	mg/L = mmol/L × 90.03

Oxalate (spot urine) is reported in mg/L or mmol/L. The page converts between the units only.

mmol/L × 90.03 = mg/L (exact factor 90.03).
No established reference range is listed here; compare your result only with the range printed on your own report.

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Source: PubChem: Oxalic Acid · Last reviewed: 2026-10-19

Note from the source: No established reference range; the page converts units only. Mass-to-amount conversion uses a molar mass of 90.03 g/mol.