Roentgens to Milliroentgens
1 R = 1,000 mR. Edit either value to convert instantly.
Conversion formula
mR = R × (0.000258) × (500,000,000 / 129)1 R = 1,000 mR
roentgen (R)
roentgen is a unit of radiation exposure: 1 R = 0.000258 C/kg.
Source: NIST SP 811, Appendix B.9: conversion factors by quantity
milliroentgen (mR)
milliroentgen is a unit of radiation exposure: 1 mR = 2.58 × 10⁻⁷ C/kg.
Source: NIST SP 811, Appendix B.9: conversion factors by quantity
Conversion table
| R | mR |
|---|---|
| = 1,000 | |
| = 2,000 | |
| = 5,000 | |
| = 10,000 | |
| = 15,000 | |
| = 20,000 | |
| = 25,000 | |
| = 30,000 | |
| = 40,000 | |
| = 45,000 |
| R | mR |
|---|---|
| = 50,000 | |
| = 60,000 | |
| = 70,000 | |
| = 80,000 | |
| = 90,000 | |
| = 100,000 | |
| = 150,000 | |
| = 160,000 | |
| = 170,000 | |
| = 180,000 |
Frequently asked questions
How many milliroentgens are in 1 roentgen?
1 R = 1,000 mR. mR = R × (0.000258) × (500,000,000 / 129)
How do I convert R to mR?
mR = R × (0.000258) × (500,000,000 / 129)
Is 1 roentgen bigger than 1 milliroentgen?
1 R = 1,000 mR.
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