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Radiation - Exposure Converter
Result
... Roentgen = ... Coulomb per kilogram
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Roentgen to Coulomb per kilogram Converter
Use this page to convert roentgen values into coulomb per kilogram, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 R = 0.000258 C/kg
1 C/kg = 3,875.96899224806 R
Example: 0.001 R = 0.000000258 C/kg
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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
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 to Coulomb per kilogram table
| Roentgen [R] | Coulomb per kilogram [C/kg] |
|---|---|
| 0.01 R | 0.00000258 C/kg |
| 0.1 R | 0.0000258 C/kg |
| 1 R | 0.000258 C/kg |
| 2 R | 0.000516 C/kg |
| 5 R | 0.00129 C/kg |
| 10 R | 0.00258 C/kg |
| 20 R | 0.00516 C/kg |
| 50 R | 0.0129 C/kg |
| 100 R | 0.0258 C/kg |
Frequently asked questions
How many Coulomb per kilogram (C/kg) are in one Roentgen (R)?
One Roentgen equals 0.000258 Coulomb per kilogram.
How do you convert Roentgen to Coulomb per kilogram?
Multiply the Roentgen value by 0.000258 to get the result in Coulomb per kilogram.
How do you convert Coulomb per kilogram back to Roentgen?
Multiply the Coulomb per kilogram value by 3,875.96899224806 to get back to Roentgen.
What is 0.001 Roentgen in Coulomb per kilogram?
0.001 Roentgen equals 0.000000258 Coulomb per kilogram.