Convert Roentgens to Milliroentgens
1 roentgen = 1,000 milliroentgens. Multiply the number of roentgens by 1000.
1 R = 1,000 mR
Multiply the number of roentgens by 1000.
For information only. Confirm dose and exposure values with a qualified radiation safety professional. About accuracy
Popular radiation exposure conversions
Roentgens to Milliroentgens table
| Roentgens | Milliroentgens |
|---|---|
| 1 R | 1,000 mR |
| 2 R | 2,000 mR |
| 3 R | 3,000 mR |
| 4 R | 4,000 mR |
| 5 R | 5,000 mR |
| 10 R | 10,000 mR |
| 20 R | 20,000 mR |
| 25 R | 25,000 mR |
| 50 R | 50,000 mR |
| 100 R | 100,000 mR |
| 500 R | 500,000 mR |
| 1000 R | 1,000,000 mR |
About these units
The roentgen (R) is a specialist or regional unit of radiation exposure, equal to 0.000258 coulombs per kilogram.
The milliroentgen (mR) is a specialist or regional unit of radiation exposure, equal to 2.58e-7 coulombs per kilogram.
Going the other way, 1 milliroentgen = 0.001 roentgens. 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 milliroentgens are in a roentgen?
- 1 roentgen = 1,000 milliroentgens.
- How do you convert roentgens to milliroentgens?
- Multiply the number of roentgens by 1000.
- What is 10 R in mR?
- 10 R = 10,000 mR.