Urine & CSF

Citrate (24-h urine) unit converter

Citrate excreted in 24-hour urine (stone prevention)

Also known as: Urinary citrate, Citrat im Urin, Citric acid urine

Converter

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

mmol/24 h mg/24 h

Worked example

2.7 mmol/24 h (middle of the reference range) = 519 mg/24 h

Conversion formulas

mg/24 h	mg/24 h = mmol/24 h × 192.1	mmol/24 h = mg/24 h × 0.005205

Good to know

Citrate (24-h urine) is reported in mmol/24 h or mg/24 h. The page converts between the units only.

mg/24 h × 0.005205 = mmol/24 h (exact factor 0.005205).
The range shown is a guide from the named source; targets and reference ranges differ between laboratories, methods and indications, so compare with the range on your own report.

Reference range

Unit	Adults
mmol/24 h	0.6 – 4.8
mg/24 h	115.3 – 922.2

Source: Severn Pathology (North Bristol NHS Trust): Citrate · Last reviewed: 2026-10-19

Note from the source: 0.6-4.8 mmol/24 h (Severn Pathology); another NHS laboratory quotes 1.3-6.0 mmol/24 h (Newcastle). mg/24 h is calculated as citric acid (192.12 g/mol). Low citrate favours calcium stones

Frequently asked questions

How do I convert Citrate (24-h urine) from mmol/24 h to mg/24 h?

mg/24 h = mmol/24 h × 192.1. In the other direction: mmol/24 h = mg/24 h × 0.005205.

What is the reference range of Citrate (24-h urine)?

For adults the range is 0.6 – 4.8 mmol/24 h (Severn Pathology (North Bristol NHS Trust): Citrate). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Citrate (24-h urine)?

Common units are mmol/24 h, mg/24 h.