3 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 6 drumsticks instead of 2.
Assumes 30 adults, a full holiday table of sides, no leftovers planned.
Thirty guests is three birds, and three birds is the point at which you should stop thinking about a turkey dinner and start thinking about a turkey operation. Thirty adults need around fifteen pounds of meat. Three twelve-pounders cover that comfortably, and they will finish faster than two enormous ones while being safer the whole way.
The maths, step by step
1. Meat needed 30 adults × 0.5 lb = 15 lbs
2. Less 20% for a full table of sides 15 × 0.8 = 12 lbs
3. Raw weight (a whole bird is ~40% meat) 12 ÷ 0.4 = 30 lbs raw
30 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
37.5 lb
15 lb
3 birds, ~13 lb each
Full holiday table
30 lb
12 lb
3 birds, ~10 lb each
Full table + leftovers
39 lb
15.6 lb
3 birds, ~13 lb each
Kids under 12 eat about 0.25 lb each — half an adult portion. Swapping four of your 30 adults for four kids takes roughly 2 lbs off the raw weight.
Cooking for 30: what actually goes wrong
Three birds will not fit on most backyard smokers at once, so plan two rounds and a hold, or borrow a second cooker. Turkey holds far less gracefully than brisket — an hour is fine, three is not — so if you are cooking in rounds, cook the second round to finish as the first is being carved rather than hours earlier.
How long it takes
At 275°F — the temperature worth using, because it is the one that crisps the skin — a 10 lb bird takes about 3 h 20 m on the smoker, plus a 30-minute rest. Full timeline and start times on the 10 lb at 275°F page, or use the calculator to work backwards from your own carving time.
Not exactly 30 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 30 people?
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For 30 adults with a full holiday table, buy about 30 lbs of whole turkey — 3 birds, ~10 lb each. That yields roughly 12 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 37.5 lbs.
What size turkey for 30 guests?
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3 birds, ~10 lb each 3 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 6 drumsticks instead of 2.
How much turkey for 30 people if I want leftovers?
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Add about 30% and buy 39 lbs instead of 30 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 30 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 30 guests need only about 18.5 lbs of breast — 3 bone-in breasts, ~6.5 lb each. You lose the drumsticks and the centrepiece, and you gain time, oven space and all white meat.