How long to cook a 12 pound turkey in a convection oven?

In a convection oven, a 12-pound turkey generally takes about 2 to 2.5 hours to cook at a temperature of 325°F (163°C). The convection fan circulates hot air, which helps cook the turkey more evenly and quickly than a conventional oven. Always use a meat thermometer to ensure the internal temperature reaches at least 165°F (74°C) in the thickest part of the breast and thigh. Let the turkey rest for at least 20 minutes before carving for the best results.