A 20 lb turkey takes 4½ to 5 hours at 325°F unstuffed, or 4¾ to 5¼ hours stuffed (USDA). Thaw it in the fridge for 4–5 days first.
| 20 lb turkey | |
|---|---|
| Roasting time, unstuffed | 4½ to 5 hours at 325°F |
| Roasting time, stuffed | 4¾ to 5¼ hours at 325°F |
| Resting time | 20–30 minutes before carving |
| Thaw in the fridge | 4–5 days (24 hours per 4–5 lb) |
| Thaw in cold water | about 10 hours (30 minutes per lb) |
| For Thanksgiving (Nov 26), move it to the fridge by | Saturday, November 21 |
| For Christmas, move it to the fridge by | Sunday, December 20 |
| Feeds | about 20 people, or 13 with leftovers |
| Done when | 165°F in the thickest part of the thigh, the wing and the thickest part of the breast |
USDA roasting time for a 20 lb turkey
The USDA timetable for a whole turkey at 325°F gives 4½ to 5 hours unstuffed and 4¾ to 5¼ hours stuffed for a 20 lb bird (about 9.1 kg). Start checking at the low end and plan your day around the high end.
20 lb sits on the line between two rows of the USDA chart. We use the longer row, so you start checking early and never plan too short.
The USDA recommends cooking stuffing in a separate dish. If you do stuff the bird, the center of the stuffing must also reach 165°F.
What time should a 20 lb turkey go in the oven?
Subtract the roasting time and a 30-minute rest from when you want to eat:
| Dinner at | Turkey in the oven | Start checking the temperature | Out to rest by |
|---|---|---|---|
| 1:00 PM | 7:30 AM | 12:00 PM | 12:30 PM |
| 2:00 PM | 8:30 AM | 1:00 PM | 1:30 PM |
| 3:00 PM | 9:30 AM | 2:00 PM | 2:30 PM |
| 4:00 PM | 10:30 AM | 3:00 PM | 3:30 PM |
| 5:00 PM | 11:30 AM | 4:00 PM | 4:30 PM |
How long to thaw a 20 lb turkey
In the fridge: about 24 hours for every 4–5 lb, so 4–5 days. For Thanksgiving on Thursday, November 26, 2026, move it to the fridge by Saturday, November 21. For Christmas, by Sunday, December 20.
Ran out of time? Thaw it in its wrapping in cold water, allowing 30 minutes per pound (about 10 hours) and changing the water every 30 minutes. Cook it straight away. See how to thaw a turkey fast.
Nearby sizes
| Weight | Unstuffed at 325°F | Stuffed at 325°F |
|---|---|---|
| 18 lb | 4¼ to 4½ hours | 4¼ to 4¾ hours |
| 20 lb | 4½ to 5 hours | 4¾ to 5¼ hours |
| 22 lb | 4½ to 5 hours | 4¾ to 5¼ hours |
How many people does a 20 lb turkey feed?
Allow about 1 lb of whole turkey per person, or 1½ lb for leftovers. A 20 lb turkey feeds about 20 people, or 13 with plenty of leftovers. More in how much turkey per person.
How to tell it's done
Use a food thermometer. The USDA says the turkey is safe at 165°F, checked in the thickest part of the thigh, the wing and the thickest part of the breast. Pop-up timers aren't reliable on their own.
In Canada?
Health Canada advises cooking a whole bird to 82°C (180°F), and thawing in the fridge allows about 24 hours per 2.5 kg (5 lb). See turkey thawing and temperatures in Canada.
Other sizes: 12 lb · 14 lb · 16 lb · 18 lb · 20 lb · full thawing chart
FAQs
How long does a 20 lb turkey take to cook?
4½ to 5 hours unstuffed at 325°F, or 4¾ to 5¼ hours stuffed (USDA). Then rest it for 20–30 minutes.
What time should I put a 20 lb turkey in for a 4 PM dinner?
By 10:30 AM: up to 5 hours of roasting plus a 30-minute rest. Start checking the temperature at 3:00 PM.
How long does a 20 lb turkey take to thaw?
4–5 days in the fridge, or about 10 hours in cold water. For Thanksgiving 2026, move it to the fridge by Saturday, November 21.
How many people does a 20 lb turkey feed?
About 20 people, or 13 if you want leftovers.
Plan it in minutes
Type your 20 lb turkey and dinner time into the Thanksgiving Dinner Planner: you get the thaw date, oven time and a clock time for every side, plus the menu, shopping list and guest list.
See the Thanksgiving Dinner Planner →
