Turkey Size Calculator
What size bird to buy, when to start thawing it, and how long to roast it — worked out from your guest list, so nothing is still frozen on Thursday morning.
Times here are planning estimates. Doneness is a temperature, not a clock. Turkey is safe at 165°F in the innermost thigh and wing and the thickest part of the breast — and stuffing must hit 165°F too. Never thaw a turkey on the counter, and don't rinse it: splashing spreads bacteria around your sink. See USDA's turkey guide.
Counted as half an adult.
The weight on the label — raw, as purchased.
You need
Enter your guest count
| Plan | Amount |
|---|---|
| Carved meat | — |
| Fridge thaw (start by) | — |
| Cold-water thaw (faster) | — |
| Roast at 325°F | — |
| Rest before carving | — |
| Leftovers after the meal | — |
Frozen whole birds are often loss-leaders in November; breast meat runs several times higher per pound.
How to Work Out Turkey Size
The whole thing turns on one fact people find surprising: a whole turkey is only about 45% edible meat. Bone, skin, cavity and moisture loss take the rest. That's why the planning number sounds so generous.
- Start at 1 lb of whole turkey per adult, counting kids under 12 as half. That lands near a 7 oz serving with modest leftovers.
- Adjust for how you eat: 0.75 lb if the table is groaning with sides and nobody wants leftovers; 1.5 lb if the leftovers are the point.
- Buy the next size up. Turkeys don't come in exact weights, and the gap between "enough" and "plenty" is a couple of dollars.
- Work backwards from dinner — thaw time is the deadline that actually catches people out, not roasting time.
The formulas
Turkey lb = (adults + kids × 0.5) × lb-per-adult
Carved meat ≈ turkey lb × 0.45 · Fridge thaw = 24 h per 4 lb
Worked example — 10 adults + 2 kids, some leftovers: (10 + 1) × 1 lb = 11 lb turkey, about 5 lb of carved meat, 3 days of fridge thawing, and 2¾–3 hours in a 325°F oven unstuffed.
Quick Reference by Guest Count
Whole bird, 1 lb per adult with modest leftovers (kids count half in the calculator): Every row is the calculator above at its default settings.
| Adults | Turkey (lb) | Carved meat | Fridge thaw (start by) | Roast at 325°F |
|---|---|---|---|---|
| 4 | 4 | 1.8 lb (~4 servings) | 1 day ahead | 2 hr 45 min – 3 hr |
| 6 | 6 | 2.7 lb (~7 servings) | 2 days ahead | 2 hr 45 min – 3 hr |
| 8 | 8 | 3.6 lb (~9 servings) | 2 days ahead | 2 hr 45 min – 3 hr |
| 10 | 10 | 4.5 lb (~12 servings) | 3 days ahead | 2 hr 45 min – 3 hr |
| 12 | 12 | 5.4 lb (~14 servings) | 3 days ahead | 3 hr – 3 hr 45 min |
| 16 | 16 | 7.2 lb (~19 servings) | 4 days ahead | 3 hr 45 min – 4 hr 15 min |
| 20 | 20 | 9 lb (~24 servings) | 5 days ahead | 4 hr 30 min – 5 hr |
| 25 | 25 | 11.3 lb (~30 servings) | 7 days ahead | 4 hr 30 min – 5 hr |
| 30 | 30 | 13.5 lb (~36 servings) | 8 days ahead | 4 hr 30 min – 5 hr |
Over about 20 lb, two smaller birds beat one giant one: they thaw faster, roast faster, fit the oven, and give you twice the drumsticks.
Before the Big Day
- Thawing is the real deadline. A 20 lb bird needs five days in the fridge. Count backwards from dinner and put it on the calendar — this is the single most common Thanksgiving disaster.
- Rescue plan: still frozen? Cold-water thawing takes 30 minutes per pound with the water changed every 30 minutes. It works, it just chains you to the sink.
- Don't rinse the turkey. It spreads bacteria around your sink and worktops without making anything safer. Roasting is what kills it.
- Bake the stuffing separately. Stuffing has to reach 165°F too, and getting it there inside the bird means overcooking the breast to do it.
- Rest it 20–40 minutes. Tented with foil it stays hot far longer than you'd think, and that's your window for gravy and the last sides.
- Leftovers: 3–4 days in the fridge, and get them in there within two hours of coming out of the oven.
Frequently Asked Questions
How many pounds of turkey per person?
1 lb per adult for the meal plus modest leftovers; 0.75 lb with lots of sides, 1.5 lb if you want sandwiches all weekend. Kids under 12 count as half.
What size turkey for 10 people?
A 10–12 lb bird, yielding roughly 4.5 lb of carved meat.
How long to thaw a turkey?
24 hours per 4–5 lb in the fridge. Cold water is 30 min per pound with a water change every 30 minutes. Never on the counter.
How long to cook a turkey at 325°F?
About 3–3¾ hr for 12–14 lb unstuffed, 3¾–4¼ hr for 14–18 lb. Stuffed adds ~30 min. Cook to temperature, not time.
What temperature is turkey done?
165°F in the innermost thigh and wing and the thickest part of the breast — and in the stuffing, if you stuffed it.
How much turkey breast per person?
About ½ lb boneless or ¾ lb bone-in. Breast yields far more edible meat per pound than a whole bird.
Do I have to rest it?
Yes — 20 minutes minimum, 40 for a big bird. The temperature keeps rising and the juices settle.
What size turkey do I need for 8 people?
For 8 adults with modest leftovers, buy about a 8 lb turkey — 8 guests · look for 8–10 lb. Start thawing it in the fridge 2 days ahead, roast it unstuffed at 325°F for 2 hr 45 min – 3 hr, and expect 3.6 lb (~9 servings) of carved meat.
What size turkey do I need for 12 people?
For 12 adults with modest leftovers, buy about a 12 lb turkey — 12 guests · look for 12–14 lb. Start thawing it in the fridge 3 days ahead, roast it unstuffed at 325°F for 3 hr – 3 hr 45 min, and expect 5.4 lb (~14 servings) of carved meat.
What size turkey do I need for 20 people?
For 20 adults with modest leftovers, buy about a 20 lb turkey — 20 guests · look for 20–22 lb. Start thawing it in the fridge 5 days ahead, roast it unstuffed at 325°F for 4 hr 30 min – 5 hr, and expect 9 lb (~24 servings) of carved meat.
References
- USDA FSIS — “Turkey Basics: Safe Thawing” and the FSIS poultry roasting guidance (thawing times, roasting brackets, 165°F): fsis.usda.gov
- USDA FSIS — safe minimum internal temperature chart: fsis.usda.gov
- FoodSafety.gov — cold food storage and leftover limits: foodsafety.gov
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