Convert Microroentgens to Femtocoulombs per kilogram
Convert Microroentgens (µR) to Femtocoulombs per kilogram (fC/kg) instantly and accurately.
Conversion Formula
fC/kg = µR × 258000
About Microroentgens
The microroentgen (µR) equals 2.58 × 10⁻¹⁰ C/kg. Standard unit for very low environmental gamma dose rates in legacy US instrumentation: airborne radiological surveys over background areas report µR/h; EPA environmental monitoring network stations historically logged µR/h for outdoor gamma levels. 1 µR = 2.58 × 10⁻¹⁰ C/kg.
About Femtocoulombs per kilogram
The femtocoulomb per kilogram (fC/kg) equals 10⁻¹⁵ C/kg. Used in computational dosimetry to characterise the ionisation yield from single low-energy photon interactions in nanogram air volumes; ultra-sensitive free-air ionisation chamber simulations in microdosimetry research report air-ionisation at the fC/kg level. 1 fC/kg = 10⁻¹⁵ C/kg = 10⁻³ pC/kg.
Quick Reference Table
| Microroentgens (µR) | Femtocoulombs per kilogram (fC/kg) |
|---|---|
| 1 µR | 258000 fC/kg |
| 2 µR | 516000 fC/kg |
| 5 µR | 1290000 fC/kg |
| 10 µR | 2580000 fC/kg |
| 25 µR | 6450000 fC/kg |
| 50 µR | 12900000 fC/kg |
| 100 µR | 25800000 fC/kg |