Turkey cooking time depends on several factors: weight (the primary variable), whether it's stuffed (adds 20–25% cooking time), and oven temperature. The USDA's foundation guideline is approximately 13–15 minutes per pound for unstuffed birds at 325°F, and 15–18 minutes per pound for stuffed birds at the same temperature. This calculator uses these USDA guidelines as its 325°F baseline. However, the most reliable doneness indicator is an instant-read meat thermometer. For temperatures other than 325°F, this calculator applies a simple linear adjustment (approximately ±1 minute per pound per 25°F difference). Real-world variation depends on oven calibration, turkey shape, and other factors, so non-325°F results are heuristic estimates, not pulled from USDA published timetables. Always verify doneness by checking the internal temperature of the thickest part of the thigh (away from bone): 165°F minimum for food safety. Many cooks prefer thighs at 170–175°F for enhanced flavor and texture.

Oven calibration critically affects actual cooking time—many home ovens run 10–25°F hotter or cooler than their displays indicate. Use an oven thermometer to verify temperature, especially for holiday cooking where turkey represents a significant investment. Positioning matters too: center-rack placement ensures even air circulation; racks too high brown the external skin before internal meat reaches 165°F, while bottom racks can over-brown the bottom skin. Basting every 45 minutes (but opening the oven door infrequently—each opening adds ~15 minutes to total cook time) helps ensure browning. Tent with foil if browning too quickly. The bird's resting period—20–30 minutes after removal—is essential; carryover cooking continues during rest, and allowing juices to redistribute prevents a dry, stringy texture upon carving.