Convert Microcoulombs per kilogram to Roentgens
Convert Microcoulombs per kilogram (µC/kg) to Roentgens (R) instantly and accurately.
Conversion Formula
R = µC/kg × 0.003875968992
About Microcoulombs per kilogram
The microcoulomb per kilogram (µC/kg) equals 10⁻⁶ C/kg ≈ 3.88 mR. Used in precision ionisation chamber measurements for X-ray beam quality characterisation; national standards laboratories express free-air chamber calibration factors in µC/kg. 1 µC/kg = 10⁻⁶ C/kg = 10⁻³ mC/kg.
About Roentgens
The roentgen (R) equals exactly 2.58 × 10⁻⁴ C/kg, the historical unit of X-ray and gamma-ray exposure defined in 1928 (ICRU) and redefined exactly in 1962. Still widely used in the US: field survey instruments read in R/h; NRC and EPA regulations cite R and mR; the Chernobyl accounts famously reported readings in R/h. 1 R = 2.58 × 10⁻⁴ C/kg.
Quick Reference Table
| Microcoulombs per kilogram (µC/kg) | Roentgens (R) |
|---|---|
| 1 µC/kg | 0.00387597 R |
| 2 µC/kg | 0.00775194 R |
| 5 µC/kg | 0.0193798 R |
| 10 µC/kg | 0.0387597 R |
| 25 µC/kg | 0.0968992 R |
| 50 µC/kg | 0.193798 R |
| 100 µC/kg | 0.387597 R |