Converter
exposure to X or gamma radiation · International / US legacy · Historical/legacy
röntgen
exact
- Record
- M341
- Definition quality
- Exact by definition
- Conversion mode
- multiplicative
- Calculator
- Fully calculable
Definition
1 R = 2.58×10⁻⁴ C/kg
Reference value
One röntgen is exactly 0.000258 coulomb per kilograms.
History & use
The röntgen belongs to an older radiation-unit system that predates modern SI radiological quantities.
Modern use
Modern use is context-dependent and varies by region or measurement system.