ARR unit converter

Convert ARR between ng/dL per ng/mL/h and pmol/L per ng/mL/h. Type in either box. The factors come from our catalog and are checked by code.

AI-drafted. Awaiting verificationLast reviewed 2026-10-03

From

1 ng/dL per ng/mL/h = 27.7469 pmol/L per ng/mL/h. Nothing you type here leaves your browser.

The conversion

1 ng/dL per ng/mL/h = 27.75 pmol/L per ng/mL/hFrom ng/dL per ng/mL/h to pmol/L per ng/mL/h: multiply by 27.75. Back again: divide by 27.75.

Mass and molar units are linked by the molecular weight: 360.4 g/mol (aldosterone (the numerator of the ratio), C21H28O5 (PubChem CID 5839)). Source: NCBI PubChem.

Common values

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

ARR values in ng/dL per ng/mL/h and pmol/L per ng/mL/h
ng/dL per ng/mL/h	pmol/L per ng/mL/h
10	277
15	416
20	555
30	832
40	1,110
50	1,387
60	1,665

Usual ranges in each unit

What labs print as the reference range, by who was tested. Sources for each range are on the ARR page.

Usual ranges for ARR in ng/dL per ng/mL/h and pmol/L per ng/mL/h
Who	ng/dL per ng/mL/h	pmol/L per ng/mL/h
Adults	0–30	0–832