What are the units that radiation dose is measured in?

Radiation dose is primarily measured in gray (Gy), which quantifies the amount of radiation energy absorbed per kilogram of matter. For measuring biological effects of radiation, the sievert (Sv) is used, which accounts for the type of radiation and its impact on human tissue. Other units include the rad (1 rad = 0.01 Gy) and the rem (1 rem = 0.01 Sv), though these are less commonly used in modern contexts.