A 13 lb turkey smokes safely and evenly. Don't go bigger than 14 lb on a smoker — big birds spend too long in the danger zone.
Assumes 12 adults, a full holiday table of sides, no leftovers planned.
Twelve is where you stop being able to seat everyone at the usual table and start hunting for the extra leaf. Meat-wise it is still comfortably one bird — twelve adults need around six pounds of meat, which a mid-teens turkey covers with room to spare. The reason to think carefully at twelve is not the total, it is the mix: this is usually the headcount where the guest list stops being all adults, and four kids in the count changes the bird you need by a couple of pounds.
The maths, step by step
1. Meat needed 12 adults × 0.5 lb = 6 lbs
2. Less 20% for a full table of sides 6 × 0.8 = 4.8 lbs
3. Raw weight (a whole bird is ~40% meat) 4.8 ÷ 0.4 = 12.5 lbs raw
12 guests, three ways
Sides move this number more than anything else, and leftovers are a deliberate choice rather than an accident.
Scenario
Raw turkey
Meat
What to buy
Few sides, no leftovers
15 lb
6 lb
2 birds, ~10 lb each
Full holiday table
12.5 lb
4.8 lb
One 13 lb bird
Full table + leftovers
16 lb
6.2 lb
2 birds, ~10 lb each
Kids under 12 eat about 0.25 lb each — half an adult portion. Swapping four of your 12 adults for four kids takes roughly 2.5 lbs off the raw weight.
Cooking for 12: what actually goes wrong
Buy for the adults and treat the kids as a margin rather than a line item. Children eat roughly half an adult portion of turkey and fill up on rolls and potatoes long before they come back for seconds of white meat.
How long it takes
At 275°F — the temperature worth using, because it is the one that crisps the skin — a 14 lb bird takes about 4 h 40 m on the smoker, plus a 30-minute rest. Full timeline and start times on the 14 lb at 275°F page, or use the calculator to work backwards from your own carving time.
Not exactly 12 guests?
Adjust the headcount, add kids, switch to a bone-in breast, or plan for leftovers — every number updates as you type.
Smoked turkey portion calculator
Common questions
How much turkey do I need for 12 people?
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For 12 adults with a full holiday table, buy about 12.5 lbs of whole turkey — one 13 lb bird. That yields roughly 4.8 lbs of servable meat, because a whole bird is only about 40% meat once bone, skin and carcass are removed. With only a couple of sides, go up to 15 lbs.
What size turkey for 12 guests?
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One 13 lb bird A 13 lb turkey smokes safely and evenly. Don't go bigger than 14 lb on a smoker — big birds spend too long in the danger zone.
How much turkey for 12 people if I want leftovers?
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Add about 30% and buy 16 lbs instead of 12.5 lbs. Turkey leftovers are the one holiday leftover people genuinely plan for, so this is rarely wasted.
Could I smoke bone-in breasts instead for 12 people?
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Yes, and it is often the smarter buy. A bone-in breast is about 65% meat against a whole bird's 40%, so 12 guests need only about 7.5 lbs of breast — 2 bone-in breasts, ~4 lb each. You lose the drumsticks and the centrepiece, and you gain time, oven space and all white meat.