Convert Milliroentgens to Femtocoulombs per kilogram
Convert Milliroentgens (mR) to Femtocoulombs per kilogram (fC/kg) instantly and accurately.
Conversion Formula
fC/kg = mR × 258000000
About Milliroentgens
The milliroentgen (mR) equals 2.58 × 10⁻⁷ C/kg. Standard unit in US health physics for area gamma surveys: personal dosimeters and Geiger counters in medical and industrial radiography settings display mR/h; NRC licence conditions often specify dose-rate limits in mR/h at facility boundaries. 1 mR = 2.58 × 10⁻⁷ 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
| Milliroentgens (mR) | Femtocoulombs per kilogram (fC/kg) |
|---|---|
| 1 mR | 258000000 fC/kg |
| 2 mR | 516000000 fC/kg |
| 5 mR | 1.29 × 109 fC/kg |
| 10 mR | 2.58 × 109 fC/kg |
| 25 mR | 6.45 × 109 fC/kg |
| 50 mR | 1.29 × 1010 fC/kg |
| 100 mR | 2.58 × 1010 fC/kg |