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Radiation Exposure Dose Converter

Enter an exposure value and pick a unit to instantly convert between coulombs per kilogram (C/kg), microcoulombs per kilogram (µC/kg), roentgens (R), and milliroentgens (mR). A free tool that converts accurately using the defined value 1 R = 2.58×10⁻⁴ C/kg.

Input

Input unit

Result

Coulombs per kilogram (C/kg) equivalent

0.000258C/kg

UnitSymbolConverted value
Coulombs per kilogramC/kg0.000258
Microcoulombs per kilogramµC/kg258
RoentgenR1
MilliroentgenmR1,000

How it works

  • Exposure dose is a quantity that expresses the amount of ionization (electric charge produced) that X-rays or gamma rays create in air, with the base unit being coulombs per kilogram (C/kg).
  • Enter the value to convert and choose its input unit, and the tool displays the conversion results for all corresponding units in a table.
  • The roentgen (R) is a traditional unit, converted accurately using the defined value 1 R = 2.58×10⁻⁴ C/kg.
  • The milliroentgen (mR) is one-thousandth of a roentgen, and the microcoulomb per kilogram (µC/kg) is one-millionth of a C/kg.
  • When a converted result is extremely large or small, it is shown in exponential notation so the digits are easy to read.
  • Note that exposure dose measures ionization in air and is a different quantity from absorbed dose (grays) or effective dose (sieverts), which describe effects on the human body.