RADIATION
Radiation exposure
Ionizing-radiation exposure in air.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result1000 mR1 R = 1000 mR
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R to mR Converter
Convert roentgen (R) to milliroentgen (mR). Enter a value for an instant result, or use the examples and reverse conversion below.
520units ready to convert
HOW IT IS CALCULATED
Convert through coulomb per kilogram
Enter a roentgen value to calculate milliroentgen with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| coulomb per kilogramfrom R | C/kg | 0.000258 |
| millicoulomb per kilogramfrom R | mC/kg | 0.258 |
| roentgenfrom R | R | 1 |
| milliroentgenfrom R | mR | 1000 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
R to mR Conversion Reference
Roentgen (R) and milliroentgen (mR) are units of radiation exposure. Use this page to convert in either direction.
Conversion Examples
| Roentgen (R) | Milliroentgen (mR) |
|---|---|
| 1 R | 1000 mR |
| 5 R | 5000 mR |
| 10 R | 10000 mR |
| 100 R | 100000 mR |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
mR to R (milliroentgen to roentgen)