How Long to Cook Turkey 15 Lbs: Timing, Temps and a Full Schedule

By Bennett Marlowe

A 15 lb turkey typically needs about 3 hours and 15 minutes to 3 hours and 45 minutes in a conventional oven set to 325°F, unstuffed. This guide explains how long to cook turkey 15 lbs, how to confirm it is safe to eat, and how to build a schedule so everything reaches the table at the same time. You will also see how stuffing, oven type and starting temperature change the timing.

Treat those times as a starting point rather than a promise. Every bird and every oven behaves a little differently, so the thermometer, not the clock, decides when the turkey is done.

How Long to Cook a 15 lb Turkey: The Basic Timing

For an unstuffed, thawed 15 lb turkey roasted at 325°F, most cooks plan for roughly 13 to 15 minutes per pound. That works out to about 3 hours 15 minutes to 3 hours 45 minutes. A bird that goes into the oven fridge-cold may need the upper end of that range, while one that has been resting at room temperature for a short time may finish a bit sooner.

If you are asking how long to cook a turkey 15 lbs stuffed, add time. Stuffed birds usually take 3 to 4 hours or longer, because the stuffing has to reach 165°F in its center. Many cooks prefer to bake stuffing in a separate dish for this reason. For a broader look at stuffed birds, see How Long to Cook Turkey Stuffed: Times by Weight and Safe Temperatures.

Quick reference: 15 lb turkey at 325°F

These figures reflect typical oven-roasted results and general USDA guidance on minimum safe temperatures. Your actual time will depend on the factors covered below.

Step-by-Step: Roasting a 15 lb Turkey

Step 1: Thaw the turkey completely

A frozen bird cooks unevenly and can hold cold spots near the bone. Thaw it in the refrigerator at about 40°F, allowing roughly 24 hours for every 4 to 5 pounds. A 15 lb turkey usually needs 3 to 4 days in the refrigerator. For faster options, including cold-water thawing, read How to Thaw a Turkey Safely: Refrigerator, Cold Water and Microwave.

Step 2: Prepare the bird and oven

1. Remove the giblets and neck from the cavity and reserve them for stock.
2. Pat the skin dry with paper towels. Dry skin browns better.
3. Position an oven rack in the lower third of the oven so the bird sits centered.
4. Preheat the oven to 325°F. Allow 20 to 30 minutes for a full preheat.
5. Season, butter or oil the skin, and set the bird breast-side up in a roasting pan on a rack.

If you are still choosing equipment, How to Choose a Roasting Pan for Turkey: Size, Material and Rack covers sizing and rack options.

Step 3: Start roasting and calculate your timeline

Cover the breast loosely with foil for the first hour to slow browning, then remove the foil for the rest of the roast. Start a timer based on the estimate in the table above, but plan to check the temperature about 45 minutes before the expected finish time.

Step 4: Check the temperature in three places

Insert a probe thermometer into the thickest part of the thigh without touching bone. Check the breast at its thickest point and the thickest part of the wing joint. Turkey is ready when the thigh reads at least 165°F. Many cooks pull the bird at 160°F to 162°F and let carryover heat finish the job during resting. For technique, see How to Use a Meat Thermometer for Turkey (and Where to Insert It).

Step 5: Rest before carving

Move the turkey to a cutting board and tent it loosely with foil. Rest it for 30 to 45 minutes. Resting lets juices redistribute and keeps the slices moist. During this window you can finish gravy and warm side dishes.

Factors That Change the Cooking Time

Stuffing

Stuffing slows heat transfer into the cavity. A stuffed 15 lb turkey can add 45 minutes to an hour. Always check the center of the stuffing with a thermometer, not just the bird.

Oven temperature

Roasting at 350°F shortens the time but raises the risk of dry breast meat before the thighs are done. Some cooks use higher heat at the start and drop it later. Whatever you choose, adjust your timeline and keep checking early.

Starting temperature

A bird that has been refrigerated until the moment it goes in needs more time than one that has sat out briefly. Never leave a turkey on the counter for more than two hours, and never let it sit out long enough to enter the danger zone for extended periods.

Oven type

Convection ovens cook faster, often by 20 to 30 percent. Check the bird about 45 minutes earlier than you would in a conventional oven. Glass doors, which lose heat when opened, and older ovens with uneven hot spots may also shift timing.

Bird shape and fat content

A tall, narrow bird cooks differently from a broad, shallow one of the same weight. Birds with more fat may brown faster, so tent with foil if the skin darkens before the thigh is done.

Sample Holiday Timeline for a 15 lb Turkey

Working backward from a 4 p.m. dinner, with a 3 hour 30 minute roast and 45 minutes of resting, helps keep the day on track.

1. Two to four days before: Begin thawing in the refrigerator.
2. Day before: Make stuffing base, cranberry sauce and pie. Brine if desired, following How to Brine a Turkey Safely.
3. Morning of: Remove the bird from the fridge. Season and set up the pan.
4. 10:30 a.m.: Preheat oven to 325°F. Place turkey in oven.
5. 1:30 p.m.: Begin checking the thigh temperature.
6. 2:15 p.m.: Remove turkey at 160°F to 162°F in the thigh.
7. 2:30 to 3:15 p.m.: Rest the turkey while you make gravy and reheat sides.
8. 3:30 p.m.: Carve and serve.

Adjust the times if your bird weighs more or less than 15 pounds or if you are roasting stuffing inside.

Tips for a Juicy, Evenly Cooked Turkey

• Use a leave-in probe thermometer with an alarm so you do not need to open the oven repeatedly.
• Let the bird come close to room temperature for 30 minutes before roasting, but not longer.
• Baste sparingly. Opening the oven drops the temperature and extends cooking time.
• Rotate the pan halfway through if your oven heats unevenly.
• Carve after resting, cutting breast meat across the grain.

Common Mistakes

• Relying only on time. Charts are estimates. Always confirm with a thermometer.
• Checking the breast only. The breast often finishes first. Check the thigh for doneness.
• Pop-up timers as the sole guide. Many are set high and can be inaccurate. Use them as a backup at most.
• Skipping the rest. Carving straight from the oven releases juices and dries the meat.
• Underestimating thaw time. A bird still icy in the center will throw off the whole schedule.

Recommended gear

A reliable probe thermometer is the single most useful tool for this roast, because it removes guesswork from the timeline. View on Amazon

A leave-in probe with a wireless alarm lets you monitor the bird from another room, which helps when you are juggling side dishes. View on Amazon

A heavy roasting pan with a V-shaped rack lifts the bird above its drippings, which promotes even air circulation and crisper skin. View on Amazon

A long, sharp carving knife makes it easier to slice clean portions after the rest. View on Amazon

FAQ

How long does a 15 lb turkey take to cook at 350°F?

Expect roughly 2 hours 45 minutes to 3 hours 15 minutes for an unstuffed bird. Begin checking the thigh temperature earlier than you would at 325°F.

Is 165°F the right temperature for turkey?

Yes. The USDA lists 165°F as the safe minimum internal temperature for poultry, measured in the thickest part of the thigh, breast and stuffing if present.

Should I cook a 15 lb turkey covered or uncovered?

Start covered loosely with foil for the first hour or so, then uncover to brown the skin. Keep the foil ready to tent the breast if it darkens too quickly.

Can I cook a 15 lb turkey in 2 hours?

Not safely at standard roasting temperatures. A bird this size needs at least about 3 hours at 325°F. High-heat methods can shorten the time, but they require careful monitoring and specific equipment.

Does a 15 lb turkey need to rest?

Yes. Resting for 30 to 45 minutes improves juiciness and makes carving easier. The internal temperature will rise a few degrees during this time.

What if my turkey is done early?

Hold it wrapped in foil and a clean towel in a warm spot, or lower the oven to 200°F. Holding a fully cooked bird for a short period is generally fine, but keep it above 140°F and avoid long holds.

Is it safe to cook a turkey from frozen?

The USDA does not recommend roasting a fully frozen bird because the outer meat may overcook before the center reaches a safe temperature. Thaw it first.

Who should I ask about food safety questions for a special diet or medical condition?

If anyone at your table has a compromised immune system, pregnancy or another health concern, consult a registered dietitian or your healthcare provider for guidance on safe preparation.

Conclusion

A 15 lb turkey usually needs about 3 hours 15 minutes to 3 hours 45 minutes at 325°F unstuffed, and longer if stuffed. Use a thermometer, aim for 165°F in the thigh, and rest the bird before carving. Build your timeline backward from dinner and allow extra margin for thawing and resting, and the meal will come together calmly.

About Bennett Marlowe

Bennett focuses on practical advice for holiday cooking & baking: what matters before you buy, what to skip, and how to get more out of what you already own.