To ensure that a turkey is done and safe to eat, it is recommended to check its internal temperature. According to various sources, including the Department of Agriculture and Butterball, a whole turkey should reach an internal temperature of 165°F (73.9°C) in the breast and 175°F (79.4°C) in the thigh to be considered safe to eat. Its important to use a meat thermometer to accurately measure the internal temperature of the turkey to ensure that it has reached the recommended temperatures.