How Long to Cook Whole Turkey
Whole roasted turkey. Times based on an unstuffed bird. Add 15-45 minutes for stuffed.
The Short Answer
The USDA-recommended safe internal temperature is 165°F, verified with an instant-read thermometer in the thickest part. Scroll down for all cooking methods, detailed instructions, and tips from the Professor.
Always verify with an instant-read thermometer inserted into the thickest part.
Cooking Methods
🔥 Oven
Temperature: 325°F
Rest: 20 minutes
Time depends on weight. See the weight chart below. Tent with foil if skin browns too quickly. Internal temp in the thickest part of the thigh should reach 165 degrees F.
Time by Weight
| Weight | Cook Time |
|---|---|
| 8–12 lbs | 2.75–3 hours |
| 12–14 lbs | 3–3.75 hours |
| 14–18 lbs | 3.75–4.25 hours |
| 18–20 lbs | 4.25–4.5 hours |
| 20–24 lbs | 4.5–5 hours |
Start checking the temperature 30 minutes before the minimum estimated time. Every oven is different, and an overcooked turkey is a Thanksgiving tragedy the Professor cannot fix.
Frequently Asked Questions
At 325 degrees F, an unstuffed 20 lb turkey takes approximately 4.5 to 5 hours. Always verify with a thermometer.
The USDA recommends 325 degrees F for whole turkey. Higher temperatures cook faster but increase the risk of a dry breast.
The Bottom Line
Whole Turkey is straightforward to cook when you know the time and temperature. The most important number to remember is 165°F internal. An instant-read thermometer is the only reliable way to confirm doneness; color and firmness are not accurate indicators. Use the method that fits your equipment and schedule, and always let the food rest before cutting or serving. Resting allows juices to redistribute and carryover cooking to finish the job.
Source: USDA Safe Minimum Internal Temperatures | Last verified: March 19, 2026 | Our methodology