Radiation Exposure converter
Ionisation produced in air, the quantity survey meters actually measure.
Converter
Quick pairs
tap to loadOne roentgen in every radiation exposure unit
6 rows| Unit | Symbol | 1 R equals |
|---|---|---|
| Coulomb per kilogram | C/kg | 0.000258 |
| Millicoulomb per kilogram | mC/kg | 0.258 |
| Microcoulomb per kilogram | µC/kg | 258 |
| Milliroentgen | mR | 1,000 |
| Microroentgen | µR | 1,000,000 |
| Tissue roentgen | tissue R | 1 |
How the roentgen to coulomb per kilogram conversion works
Multiply by 0.000258 to go from roentgen to coulomb per kilogram:
C/kg = R × 0.000258
Going the other way, multiply by 3,875.968992, which is the same as dividing by 0.000258.
Questions
How many coulomb per kilogram are in one roentgen?
One roentgen equals 0.000258 coulomb per kilogram.
Which units does this radiation exposure converter cover?
7 units in total, all referenced to the coulomb per kilogram. They include coulomb per kilogram, millicoulomb per kilogram, microcoulomb per kilogram, roentgen, milliroentgen, microroentgen and more. Pick any pair from the two dropdown lists.
How precise are the results?
Every conversion is computed in your browser at double precision from the factors listed on this page, which follow the SI definitions and the exact international agreements for imperial and US customary units. Use the Decimals control to round the display without changing the underlying value.
Does anything I type leave my device?
No. The converter is plain JavaScript running locally, with no server round-trip, and the page keeps working offline once loaded.