Radiation - Exposure conversion
1 milliroentgen (mR) equals 0.001 roentgen (R). Enter any value below to convert from mR to R.
Enter a value and choose units. Results update instantly.
1 mR = 0.001 R
| Unit | Value |
|---|---|
| Coulomb/kilogram C/kg | 0.000000258 |
| Millicoulomb/kilogram mC/kg | 0.000258 |
| Microcoulomb/kilogram µC/kg | 0.258 |
| Roentgen R | 0.001 |
| Milliroentgen mR | 1 |
| Microroentgen µR | 1,000 |
| Parker parker | 0.001 |
| Rep rep | 0.001 |
| Sievert Sv | 0.000000258 |
| Millisievert mSv | 0.000258 |
| Microsievert µSv | 0.258 |
| Rem rem | 0.0000258 |
| Millirem mrem | 0.0258 |
Formula
Use this relationship for a direct conversion:
2 mR = 0.002 R.
SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.
Quick reference
| Milliroentgen (mR) | Roentgen (R) |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1,000 | 1 |
From unit
Milliroentgen (mR) is a unit of Radiation - Exposure. 1 mR = 2.58e-7 C/kg
Symbol: mR
To unit
Roentgen (R) is a unit of Radiation - Exposure. 1 R = 0.000258 C/kg
Symbol: R
Keep converting
Source
The SI framework is checked against NIST Guide for the Use of the International System of Units; conventional factors come from the extended factor inventory. Calculations use full internal precision before display rounding.
View the complete radiation - exposure converterQuestions
Use the formula R = mR x 0.001. 1 milliroentgen (mR) equals 0.001 roentgen (R).
SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.
