Urine & CSF

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

µmol/24 h = mg/24 h × 4.42

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mg/24 h µmol/24 h

mg/24 h → µmol/24 h	µmol/24 h = mg/24 h × 4.42
µmol/24 h → mg/24 h	mg/24 h = µmol/24 h × 0.2262

Highlighted: values inside the adult reference range.

0 – 4.072 mg/24 h = 0 – 18 µmol/24 h

Source: MedlinePlus (NLM): PBG urine test · Last reviewed: 2026-10-19

Frequently asked questions

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

µmol/24 h = mg/24 h × 4.42. For example, 2 mg/24 h equals 8.84 µmol/24 h.

How many µmol/24 h are 2 mg/24 h?

2 mg/24 h equal 8.84 µmol/24 h (Porphobilinogen (24-h urine)).

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

mg/24 h = µmol/24 h × 0.2262.