Convert Picocoulombs per kilogram to Roentgens
Convert Picocoulombs per kilogram (pC/kg) to Roentgens (R) instantly and accurately.
Conversion Formula
R = pC/kg × 3.875968992e-9
About Picocoulombs per kilogram
The picocoulomb per kilogram (pC/kg) equals 10⁻¹² C/kg. Environmental gamma exposure rates in very low background areas approach pC/kg/h; precision ionisation chamber calibration laboratories measure leakage and secondary ionisation currents in terms of pC/kg. 1 pC/kg = 10⁻¹² C/kg = 10⁻³ nC/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
| Picocoulombs per kilogram (pC/kg) | Roentgens (R) |
|---|---|
| 1 pC/kg | 3.876 × 10-9 R |
| 2 pC/kg | 7.752 × 10-9 R |
| 5 pC/kg | 1.938 × 10-8 R |
| 10 pC/kg | 3.876 × 10-8 R |
| 25 pC/kg | 9.69 × 10-8 R |
| 50 pC/kg | 1.938 × 10-7 R |
| 100 pC/kg | 3.876 × 10-7 R |