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Radiation exposure converter

Convert radiation exposure between coulombs per kilogram, millicoulombs per kilogram, roentgens and milliroentgens.

Free & no registration Calculated in your browser
01

Your inputs

The starting values are an example.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

Converted value = original value × source factor / target factor

Worked example

1 R (roentgen) = 0.000258 C/kg.

Things to check

  • Exposure is expressed in C/kg or, historically, roentgens. It differs from absorbed dose and equivalent dose, and cannot be used for a medical assessment here.
  • Rounding is applied only to displayed results. Very small or very large values may appear in scientific notation.

Sources and references