Well, how long you should roast a turkey depends largely on how much it weighs, as well as whether you plan to stuff it. For an oven set to 325°F, FoodSafety.gov recommends the following roasting times based on the weight of a fully thawed turkey:
4 to 6 pounds (breast) cooking time
1 1/2 to 2 1/4 hours
6 to 8 pounds (breast) cooking time
Unstuffed: 2 1/4 to 3 1/4 hours Stuffed: 2 1/2 to 3 1/2 hours How Many Sweet Potatoes Should I Make Per Person?
8 to 12 pound turkey cooking time
Unstuffed: 2 3/4 to 3 hours Stuffed: 3 to 3 1/2 hours
12 to 14 pound turkey cooking time
Unstuffed: 3 to 3 3/4 hours Stuffed: 3 1/2 to 4 hours
14 to 18 pound turkey cooking time
Unstuffed: 3 3/4 to 4 1/4 hours Stuffed: 4 to 4 1/4 hours
18 to 20 pound turkey cooking time
Unstuffed: 4 1/4 to 4 1/2 hours Stuffed: 4 1/4 to 4 3/4 hours
20 to 24 pound turkey cooking time
Unstuffed: 4 1/2 to 5 hours Stuffed: 4 3/4 to 5 1/4 hours
How to know when a turkey is done
While the time estimates above offer a general idea of how long a turkey will take to cook, the absolute safest way to know if your turkey is done is to use a meat thermometer. If you are cooking a stuffed turkey, you must cook it until the internal temperature of the stuffing reaches a minimum of 165°F. If the stuffing in your turkey has reached a temperature of 165°F, the temperature of the innermost part of the turkey’s thigh is likely between 165°F to 185°F, at which point it is done. If you are cooking an unstuffed turkey, roast until a temperature reading of the innermost part of the thigh reaches 165°F.
How much turkey will you need per person for your holiday dinner?
For your dinner, you can estimate that each guest will eat about 1 1/2 pounds of turkey. Here’s a general guide for how much turkey you’ll need per person:4 people – 6 pounds6 people – 9 pounds12 people – 18 pounds If you are buying a smaller bird for a smaller party – 12 pounds or less – you should allow 2 pounds per person to account for the smaller meat-to-bone ratio. These guidelines apply to both fresh and frozen turkey—if you’re cooking a frozen turkey, be sure to allow at least 24 hours of thawing for every 4 pounds of your bird. Don’t forget about dessert! Check out 150+ Thanksgiving Desserts.
