Convert Milliroentgens to Roentgens
1 milliroentgen = 0.001 roentgens. Multiply the number of milliroentgens by 0.001.
1 mR = 0.001 R
Multiply the number of milliroentgens by 0.001.
For information only. Confirm dose and exposure values with a qualified radiation safety professional. About accuracy
Popular radiation exposure conversions
Milliroentgens to Roentgens table
| Milliroentgens | Roentgens |
|---|---|
| 1 mR | 0.001 R |
| 2 mR | 0.002 R |
| 3 mR | 0.003 R |
| 4 mR | 0.004 R |
| 5 mR | 0.005 R |
| 10 mR | 0.01 R |
| 20 mR | 0.02 R |
| 25 mR | 0.025 R |
| 50 mR | 0.05 R |
| 100 mR | 0.1 R |
| 500 mR | 0.5 R |
| 1000 mR | 1 R |
About these units
The milliroentgen (mR) is a specialist or regional unit of radiation exposure, equal to 2.58e-7 coulombs per kilogram.
The roentgen (R) is a specialist or regional unit of radiation exposure, equal to 0.000258 coulombs per kilogram.
Going the other way, 1 roentgen = 1,000 milliroentgens. Exposure measures the ionisation that X-rays or gamma rays produce in air. Survey meters and older equipment read in roentgen, R, while the SI unit is the coulomb per kilogram. Exactly 1 R is 2.58 × 10⁻⁴ C/kg. Exposure is not the same as absorbed or effective dose.
Frequently asked
- How many roentgens are in a milliroentgen?
- 1 milliroentgen = 0.001 roentgens.
- How do you convert milliroentgens to roentgens?
- Multiply the number of milliroentgens by 0.001.
- What is 10 mR in R?
- 10 mR = 0.01 R.