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Radiation - Exposure Converter
Result
... Coulomb per kilogram = ... Roentgen
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Coulomb per kilogram to Roentgen Converter
Use this page to convert coulomb per kilogram values into roentgen, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 C/kg = 3,875.96899224806 R
1 R = 0.000258 C/kg
Example: 0.001 C/kg = 3.87596899224806 R
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Coulomb per kilogram
The amount of radiation that creates one coulomb of charge in one kilogram of dry air.
History: Replaced the roentgen as the standard unit for radiation exposure in the SI system.
Current use: Used in radiation protection and dosimetry to measure the ionizing ability of X-rays and gamma rays in air.
Also written as C/kg.
Roentgen
Defined as the amount of radiation that produces one esu of charge in one cubic centimeter of dry air at STP.
History: Named after Wilhelm Röntgen, the discoverer of X-rays. Established in 1928.
Current use: Largely replaced by C/kg, but still found in older equipment and historical data.
Also written as R.
Coulomb per kilogram to Roentgen table
| Coulomb per kilogram [C/kg] | Roentgen [R] |
|---|---|
| 0.01 C/kg | 38.7596899224806 R |
| 0.1 C/kg | 387.596899224806 R |
| 1 C/kg | 3,875.96899224806 R |
| 2 C/kg | 7,751.93798449612 R |
| 5 C/kg | 19,379.8449612403 R |
| 10 C/kg | 38,759.6899224806 R |
| 20 C/kg | 77,519.3798449612 R |
| 50 C/kg | 193,798.449612403 R |
| 100 C/kg | 387,596.899224806 R |
Frequently asked questions
How many Roentgen (R) are in one Coulomb per kilogram (C/kg)?
One Coulomb per kilogram equals 3,875.96899224806 Roentgen.
How do you convert Coulomb per kilogram to Roentgen?
Multiply the Coulomb per kilogram value by 3,875.96899224806 to get the result in Roentgen.
How do you convert Roentgen back to Coulomb per kilogram?
Multiply the Roentgen value by 0.000258 to get back to Coulomb per kilogram.
What is 0.001 Coulomb per kilogram in Roentgen?
0.001 Coulomb per kilogram equals 3.87596899224806 Roentgen.