What is a gray? The gray (Gy) is the base unit of absorbed dose of ionizing radiation in the International System of Units (SI), named after British physicist Louis Harold Gray. The gray definition identifies one gray as the absorption of one joule of ionizing radiation energy per kilogram of matter. The gray measures the amount of energy absorbed by matter from ionizing radiation, regardless of the biological effect. For X-rays and gamma rays, one gray equals one sievert in terms of biological effect.

Converting grays to other radiation units is essential for understanding absorbed dose measurements and radiation physics. One gray equals 1 sievert (for X-rays and gamma rays), 100 rads, 100 rems (for X-rays and gamma rays), or 1,000 milligrays. Gray conversions are fundamental to absorbed dose measurements, whether you're using a gray converter tool, learning how to convert grays, or performing gray to other units calculations. The gray's status as the SI unit for absorbed dose makes it essential for scientific calculations and international standards, providing a fundamental unit for measuring the energy absorbed from ionizing radiation.

The gray is extensively used in radiation physics, medical physics, and radiation therapy. A gray converter is valuable for radiation calculations, physics applications, and medical physics. Radiation therapy doses are measured in grays for cancer treatment. Scientists measure absorbed radiation doses in grays for research and safety assessments. The gray's status as the SI unit for absorbed dose makes it essential for scientific calculations, making gray converter tools valuable resources for professionals in radiation physics and medical physics.

What is a rad? The rad (radiation absorbed dose) is a unit of absorbed dose of ionizing radiation in the US customary system, equal to 0.01 grays or 100 ergs per gram. The rad definition makes it used in the United States for radiation physics and medical applications, though the gray is the preferred SI unit. The rad measures the amount of energy absorbed by matter from ionizing radiation. One rad equals 0.01 grays, making it a smaller unit than the gray.

Converting rads to other radiation units is essential for radiation physics and medical applications, especially for international communication. One rad equals 0.01 grays, 0.01 sieverts (for X-rays and gamma rays), 1 rem (for X-rays and gamma rays), or 10 milligrays. Rad conversions are fundamental to absorbed dose measurements in countries using US customary units, whether you're using a rad converter tool, learning how to convert rads, or performing rad to other units calculations. The rad's practical scale makes it ideal for everyday absorbed dose measurements in countries using US customary systems.

The rad is used in the United States for radiation physics and medical applications. A rad converter is valuable for radiation calculations, physics applications, and medical physics. While the gray is increasingly used internationally, the rad remains in use in certain US contexts, making rad converter tools valuable resources for professionals in radiation physics and medical physics.