Roentgen measures radioactivity, absorbed dose, or exposure. Radiation units describe decay rates, ionizing energy, and biological dose effects.
Roentgen / Gray
Estimate photon dose in grays once you specify the medium and energy deposition.
Unit definitions
Gray measures radioactivity, absorbed dose, or exposure. Radiation units describe decay rates, ionizing energy, and biological dose effects.
How to convert Roentgen to Gray
This is a three-variable conversion. Enter any two of the three values — Roentgen, Gray, and Roentgen / Gray — and the third will be calculated automatically.