Convert Nanocoulombs per kilogram to Roentgens
Convert Nanocoulombs per kilogram (nC/kg) to Roentgens (R) instantly and accurately.
Conversion Formula
R = nC/kg × 3.875968992e-6
About Nanocoulombs per kilogram
The nanocoulomb per kilogram (nC/kg) equals 10⁻⁹ C/kg. Used in modern SI-based environmental radiation monitoring; equivalent to ~3.88 µR. National metrology institutes calibrate secondary standard ionisation chambers with responses expressed in nC/kg. 1 nC/kg = 10⁻⁹ C/kg = 10⁻³ µC/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
| Nanocoulombs per kilogram (nC/kg) | Roentgens (R) |
|---|---|
| 1 nC/kg | 3.876 × 10-6 R |
| 2 nC/kg | 7.752 × 10-6 R |
| 5 nC/kg | 1.938 × 10-5 R |
| 10 nC/kg | 3.876 × 10-5 R |
| 25 nC/kg | 9.69 × 10-5 R |
| 50 nC/kg | 0.000193798 R |
| 100 nC/kg | 0.000387597 R |