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12 lb Turkey at 250°F

A 12 lb whole turkey at 250°F takes about 5 h on the smoker — plan 5 h 30 m with a 30-minute rest. For dinner at 5 PM, put it on at 11:30 AM. Change anything below and the whole plan recalculates.

Smoked turkey cook time calculator

Put it on at

11:30 AM

Total time
5 h 30 m (5 h cook + 30 m rest)
Realistic range
4 h 45 m – 6 h 15 m
Smoker temperature
Prep
Rest (minutes)

Your timeline

  1. 11:30 AMTurkey on the smoker
  2. 2:00 PMCheck color — foil the wings if they're darkening
  3. 3:45 PMStart probing the breast
  4. 4:30 PMPull it (165°F breast / 175°F thigh)
  5. 5:00 PMCarve and serve

Estimates at ±15%. The clock never decides doneness: pull when the breast reads 165°F and the thigh 175°F on an instant-read probe. Unlike brisket, turkey doesn't hold for hours — plan to carve within about an hour of the pull.

When to start a 12 lb turkey at 250°F

Whole bird, 30-minute rest. Start times round down to the quarter hour — on Thanksgiving the oven is the bottleneck, so being early is the whole point of smoking the bird outside.

Carving atPut it on at
1:00 PM (early)7:30 AM
3:00 PM9:30 AM
5:00 PM11:30 AM
7:00 PM1:30 PM

Whole or spatchcocked at 250°F?

Removing the backbone and pressing the bird flat cuts roughly a quarter off the clock and evens out the cook.

PrepCook timeWith 30 m rest
Whole bird~5 h~5 h 30 m
Spatchcocked~3 h 45 m~4 h 15 m

That is 25% off the cook — about 1 h 15 m back on a 12 lb bird, which on a crowded Thanksgiving morning is worth more than it sounds.

250°F: the compromise

250°F splits the difference honestly. A 12 lb bird runs about 5 h at 25 minutes per pound — long enough to take real smoke, hot enough that the skin renders most of the way. If you have one smoker, one bird, and no strong opinion about skin, this is the temperature to run.

It is also the most forgiving setting on a windy day. A pellet grill or offset that drifts twenty degrees either side of 250°F still lands in a sensible range, whereas the same drift at 225°F stretches the cook past the point where the breast stays juicy.

12 lb is the sweet spot for smoking. Big enough to feed a real table, small enough to clear the 40–140°F danger zone at a sensible pace, and the shape cooks evenly. If you are buying for a smoker rather than an oven, this is the size to ask for.

How many people does a 12 lb turkey feed?

A whole bird is only about 40% servable meat once the bone, skin and carcass are accounted for, so a 12 lb turkey gives you roughly 4.8 lbs on the platter — about 9 adults at a half pound each, less if the table is loaded with sides and more if you are counting on sandwiches the next day. Cooking for around 10? The turkey for 10 people page does the shopping maths, and the portion calculator handles kids, sides and leftovers.

Quick answers

How long does it take to smoke a 12 lb turkey at 250°F?

About 5 h at 250°F, which is 25 minutes per pound for a whole bird. Add a 30-minute rest and plan 5 h 30 m from lighting the smoker to carving. The honest range is 4 h 45 m to 6 h 15 m — birds vary, and so do smokers.

When should I put a 12 lb turkey on for dinner at 5 PM?

Start it at 11:30 AM at 250°F. That covers the cook plus a 30-minute rest, with the start time rounded down to the quarter hour. Unlike brisket, turkey will not hold for hours — aim to carve within an hour of pulling it.

Is a 12 lb turkey done at a certain time or a certain temperature?

Temperature, always. Pull it when the thickest part of the breast reads 165°F and the thigh reads 175°F on an instant-read probe. The 5 h estimate tells you when to start checking, not when it is finished.

Does spatchcocking a 12 lb turkey save much time?

Yes — about a quarter. Flattened, this bird drops from 5 h to roughly 3 h 45 m at 250°F, and the breast and thighs finish closer together because the whole bird sits at one height. The trade is presentation: it carves beautifully but does not make a centrepiece.

Other birds at 250°F

Never smoke a bird over 14 lb — bigger birds linger too long between 40°F and 140°F. Feeding more means more birds.