Urine Sodium 24h unit converter

Convert urine sodium 24h between mmol/24 h and mg/24 h. Type in either box. The factors come from our catalog and are checked by code.

AI-verified against cited sources. Awaiting expert reviewLast reviewed 2026-10-03

From

1 mmol/24 h = 22.9896 mg/24 h. Nothing you type here leaves your browser.

The conversion

1 mmol/24 h = 22.99 mg/24 hFrom mmol/24 h to mg/24 h: multiply by 22.99. Back again: divide by 22.99.

mmol/24 h and mEq/24 h give the same number.

Mass and molar units are linked by the molecular weight: 22.99 g/mol (sodium cation (Na+), atomic weight per PubChem CID 923. One mmol of sodium is 22.99 mg, and 1 mEq equals 1 mmol for sodium.).

Common values

From zero to about twice the usual upper limit, plus the usual limits themselves.

Urine Sodium 24h values in mmol/24 h and mg/24 h
mmol/24 hsame as mEq/24 h	mg/24 h
22	506
100	2,299
200	4,598
300	6,897
328	7,541
400	9,196
500	11,495
600	13,794

Usual ranges in each unit

What labs print as the reference range, by who was tested. Sources for each range are on the Urine Sodium 24h page.

Usual ranges for Urine Sodium 24h in mmol/24 h and mg/24 h
Who	mmol/24 h	mg/24 h
18+	22–328	506–7,541