Converter group
Radiology Converters
Radiation - Exposure Converter
Result
... Rep = ... Roentgen
Find the units to convert
Rep to Roentgen Converter
Use this page to convert rep values into roentgen, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 rep = 1 R
1 R = 1 rep
Example: 0.001 rep = 0.001 R
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Rep
A legacy unit defined as the dose of any ionizing radiation that results in the absorption of 93 ergs per gram of tissue.
History: Introduced in the 1940s to extend the roentgen to radiations other than X-rays/gamma rays.
Current use: Obsolete, replaced by the rad and subsequently the gray.
Also written as rep.
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.
Rep to Roentgen table
| Rep [rep] | Roentgen [R] |
|---|---|
| 0.01 rep | 0.01 R |
| 0.1 rep | 0.1 R |
| 1 rep | 1 R |
| 2 rep | 2 R |
| 5 rep | 5 R |
| 10 rep | 10 R |
| 20 rep | 20 R |
| 50 rep | 50 R |
| 100 rep | 100 R |
Frequently asked questions
How many Roentgen (R) are in one Rep (rep)?
One Rep equals 1 Roentgen.
How do you convert Rep to Roentgen?
Multiply the Rep value by 1 to get the result in Roentgen.
How do you convert Roentgen back to Rep?
Multiply the Roentgen value by 1 to get back to Rep.
What is 0.001 Rep in Roentgen?
0.001 Rep equals 0.001 Roentgen.