Urine & CSF

5-HIAA (24-h urine): convert mg/24 h to µmol/24 h

µmol/24 h = mg/24 h × 5.231

Calculator

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

mg/24 h µmol/24 h

mg/24 h → µmol/24 h	µmol/24 h = mg/24 h × 5.231
µmol/24 h → mg/24 h	mg/24 h = µmol/24 h × 0.1912

Highlighted: values inside the adult reference range.

0 – 14.9 mg/24 h = 0 – 77.94 µmol/24 h

Frequently asked questions

How do I convert 5-HIAA (24-h urine) from mg/24 h to µmol/24 h?

µmol/24 h = mg/24 h × 5.231. For example, 8 mg/24 h equals 41.8 µmol/24 h.

How many µmol/24 h are 8 mg/24 h?

8 mg/24 h equal 41.8 µmol/24 h (5-HIAA (24-h urine)).

How do I convert 5-HIAA (24-h urine) from µmol/24 h back to mg/24 h?

mg/24 h = µmol/24 h × 0.1912.