Arsenic (24-h urine) unit converter

Convert arsenic (24-h urine) between µg/24 h, nmol/24 h and µmol/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 µg/24 h = 13.3476 nmol/24 h. Nothing you type here leaves your browser.

The conversion

1 µg/24 h = 13.35 nmol/24 hFrom µg/24 h to nmol/24 h: multiply by 13.35. Back again: divide by 13.35.
1 µg/24 h = 0.01335 µmol/24 hFrom µg/24 h to µmol/24 h: divide by 74.92. Back again: multiply by 74.92.

Mass and molar units are linked by the molecular weight: 74.922 g/mol (arsenic (As), atomic mass. PubChem lists 74.92159.). Source: PubChem, National Library of Medicine.

Common values

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

Arsenic (24-h urine) values in µg/24 h, nmol/24 h and µmol/24 h
µg/24 h	nmol/24 h	µmol/24 h
10	133	0.13
20	267	0.27
30	400	0.4
35	467	0.47
40	534	0.53
50	667	0.67
60	801	0.8
70	934	0.93

Usual ranges in each unit

What labs print as the reference range, by who was tested. Sources for each range are on the Arsenic (24-h urine) page.

Usual ranges for Arsenic (24-h urine) in µg/24 h, nmol/24 h and µmol/24 h
Who	µg/24 h	nmol/24 h	µmol/24 h
18+	up to 35	up to 467	up to 0.47