Radiation Exposure Converter

About This Tool

This converter is a tool for the field of dosimetry and radiation safety, used for converting units of radiation exposure. Exposure is a measure of the ionization produced in air by X-rays or gamma radiation. The base unit is the coulomb per kilogram (C/kg).

The concept of exposure has been largely replaced by absorbed dose (in grays), but it is still an important quantity for calibrating radiation-producing instruments and in some regulatory contexts.

Tips & Features

• Coulomb per Kilogram (C/kg): The coulomb per kilogram is the SI unit of radiation exposure. It measures the electric charge freed by radiation in a specified mass of air.
• Roentgen (R): The roentgen is the legacy CGS unit. It was historically defined as the amount of X-radiation that would produce one electrostatic unit of charge in one cubic centimeter of dry air.
• Air Kerma: The concept of exposure is now often related to 'air kerma' (Kinetic Energy Released per unit MAss), which is measured in grays and provides a more direct link to absorbed dose.