2 smaller birds beat one giant every time at smoker temps: they clear the 40–140°F danger zone faster, cook more evenly, and give you 4 drumsticks instead of 2.
Assumes 15 adults, a full holiday table of sides, no leftovers planned.
Fifteen is the first genuinely awkward turkey number. It is more than one bird comfortably feeds and nowhere near enough to justify two — so the instinct is to reach for the biggest turkey in the case, and that instinct is wrong. A twenty-pound bird spends far too long between forty and a hundred and forty degrees at smoker temperatures, which is a food-safety problem before it is a cooking one.
The maths, step by step
1. Meat needed 15 adults × 0.5 lb = 7.5 lbs
2. Less 20% for a full table of sides 7.5 × 0.8 = 6 lbs
3. Raw weight (a whole bird is ~40% meat) 6 ÷ 0.4 = 15 lbs raw
15 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
19 lb
7.5 lb
2 birds, ~10 lb each
Full holiday table
15 lb
6 lb
2 birds, ~10 lb each
Full table + leftovers
19.5 lb
7.8 lb
2 birds, ~10 lb each
Kids under 12 eat about 0.25 lb each — half an adult portion. Swapping four of your 15 adults for four kids takes roughly 2 lbs off the raw weight.
Cooking for 15: what actually goes wrong
The right answer at fifteen is one bird at the top of the safe range plus a bone-in breast alongside it. The breast costs less than a second whole turkey, cooks in half the time, and is all white meat — which is what runs out first at every holiday table anyway.
How long it takes
At 275°F — the temperature worth using, because it is the one that crisps the skin — a 8 lb bird takes about 2 h 40 m on the smoker, plus a 30-minute rest. Full timeline and start times on the 8 lb at 275°F page, or use the calculator to work backwards from your own carving time.
Not exactly 15 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 15 people?
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For 15 adults with a full holiday table, buy about 15 lbs of whole turkey — 2 birds, ~10 lb each. That yields roughly 6 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 19 lbs.
What size turkey for 15 guests?
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2 birds, ~10 lb each 2 smaller birds beat one giant every time at smoker temps: they clear the 40–140°F danger zone faster, cook more evenly, and give you 4 drumsticks instead of 2.
How much turkey for 15 people if I want leftovers?
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Add about 30% and buy 19.5 lbs instead of 15 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 15 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 15 guests need only about 9.5 lbs of breast — 2 bone-in breasts, ~5 lb each. You lose the drumsticks and the centrepiece, and you gain time, oven space and all white meat.