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 turkey, adults only, roasted unstuffed at 325°F with modest leftovers:
| Adults | Turkey size | Carved meat | Fridge thaw | Roast time |
|---|---|---|---|---|
| 4 | 4–6 lb breast | ~2 lb | 1–2 days | 1½–2¼ hr |
| 8 | 8–10 lb | 3.6 lb | 2 days | 2¾–3 hr |
| 10 | 10–12 lb | 4.5 lb | 3 days | 2¾–3 hr |
| 12 | 12–14 lb | 5.4 lb | 3 days | 3–3¾ hr |
| 16 | 16–18 lb | 7.2 lb | 4 days | 3¾–4¼ hr |
| 20 | 20–22 lb | 9 lb | 5 days | 4½–5 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.
References
- USDA FSIS — “Let's Talk Turkey: a consumer guide to safely roasting a turkey” (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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