Protoporphyrin (blood) unit converter
Protoporphyrin in blood (erythropoietic protoporphyria, lead exposure)
Also known as: Free erythrocyte protoporphyrin, FEP, Erythrozytenprotoporphyrin
Converter
Enter a value in any unit and all other units fill in.
Worked example
0.675 µmol/L (middle of the reference range) = 38 µg/dL
Conversion formulas
| µg/dL | µg/dL = µmol/L × 56.26 | µmol/L = µg/dL × 0.01777 |
|---|---|---|
| mg/L | mg/L = µmol/L × 0.5627 | µmol/L = mg/L × 1.777 |
| µg/L | µg/L = µmol/L × 562.7 | µmol/L = µg/L × 0.001777 |
| nmol/L | nmol/L = µmol/L × 1000 | µmol/L = nmol/L × 0.001 |
Good to know
Protoporphyrin in blood is reported in µg/dL or in µmol/L.
- µg/dL × 0.0178 = µmol/L (exact factor 0.017774).
- Protect the sample from light; iron deficiency and lead exposure also raise the value.
Reference range
| Unit | Adults |
|---|---|
| µmol/L | 0.28 – 1.07 |
| µg/dL | 15.75 – 60.2 |
| mg/L | 0.1575 – 0.602 |
| µg/L | 157.5 – 602 |
| nmol/L | 280 – 1070 |
Source: MedlinePlus (NLM): Porphyrins blood test · Last reviewed: 2026-10-19
Note from the source: 16-60 µg/dL (0.28-1.07 µmol/L) (MedlinePlus). Raised in iron deficiency, lead exposure and protoporphyria. Protect the sample from light