Radiation Exposure converter
Roentgen, milliroentgen and coulombs per kilogram.
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.
Result
1 R = 0.000258 C/kg
Multiply the number of roentgens by 0.000258.
For information only. Confirm dose and exposure values with a qualified radiation safety professional. About accuracy
Popular radiation exposure conversions
All radiation exposure units
Coulomb per KilogramC/kg
RoentgenR
MilliroentgenmR
MicroroentgenµR
Millicoulomb per KilogrammC/kg
Microcoulomb per KilogramµC/kg