UnitConRadiation Exposure
Radiation exposure measures the ionization produced in air by X-rays or gamma rays. The historical unit is the roentgen, while the SI unit is coulombs per kilogram. This converter is for reference and educational purposes only. It is not a substitute for professional radiation safety guidance.
Common conversions
| From | To |
|---|---|
| 1 Roentgen | 0.000258 Coulomb per Kilogram |
| 1 Milliroentgen | 0.000000258 Coulomb per Kilogram |
| 10 Roentgen | 0.00258 Coulomb per Kilogram |
| 1 Coulomb per Kilogram | 3,875.969 Roentgen |
Frequently asked questions
Radiation exposure measures ionization created in air by certain radiation types. It is not the same as dose absorbed by tissue.
The roentgen is a historical exposure unit used mainly for X-rays and gamma rays. Older radiation instruments and documents may still reference it.
Exposure applies to ionization in air, absorbed dose measures energy deposited in material, and effective dose estimates biological effect. They are related concepts but not interchangeable.