Turkey Size Calculator

Find the right turkey size for your guest count and get an estimated roasting time at 325°F, based on standard USDA per-person and per-pound guidelines.

Quick Facts

Method
1-1.5 lb raw turkey per guest, roasted at 325°F
Roasting time uses USDA/Butterball unstuffed and stuffed whole-turkey charts, interpolated by weight.

Your Results

Calculated
Recommended turkey weight
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Raw, whole-bird weight to buy
Estimated roasting time
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At 325°F (163°C) oven
Approx. time per pound
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Reference rate used

Ready

Enter your guest count and press Calculate.

How to size a turkey for your table

The classic kitchen rule is 1 to 1.5 pounds of raw, whole turkey per guest. This range exists because a whole turkey is not 100% edible meat — bones, cavity, and cooking loss all take a share of the raw weight, so the "1 pound per person" figure is calibrated to leave a normal dinner-plate portion of meat per guest, not a full pound of edible meat. Use the lower end (1 lb/person) for a big spread with lots of side dishes or a crowd of light eaters, the middle (1.25 lb/person) for a typical holiday dinner, and the upper end (1.5 lb/person) if you want substantial leftovers for sandwiches and soup the next day.

Turning guest count into a shopping number

The formula is simple multiplication: turkey weight (lb) = number of guests × pounds per guest. For 10 guests at the standard 1.25 lb/person rate, that's 10 × 1.25 = 12.5 lb — round up to the nearest whole or half pound when you buy, since birds are sold in roughly 1-2 lb weight increments. If you're feeding a very large group (16+ guests), consider two smaller turkeys instead of one giant one — they cook faster, fit in a standard oven more easily, and carve more evenly than a bird over 24 lb.

Estimating roasting time

Once you know the weight, roasting time comes from the standard USDA/Butterball whole-turkey roasting chart for a 325°F (163°C) oven. Smaller turkeys need more minutes per pound than larger ones because of how surface area scales relative to mass — roughly 13 minutes per pound for birds under 12 lb, tapering to roughly 10 minutes per pound for birds over 20 lb. Stuffed turkeys need extra time (typically 15-25 more minutes total) because stuffing packed inside the cavity insulates the interior and slows heat penetration to the thickest part of the thigh.

Reference points worth memorizing

  • 8-12 lb turkey (unstuffed): about 2.75-3 hours at 325°F
  • 12-14 lb turkey (unstuffed): about 3-3.75 hours at 325°F
  • 14-18 lb turkey (unstuffed): about 3.75-4.25 hours at 325°F
  • 18-20 lb turkey (unstuffed): about 4.25-4.5 hours at 325°F
  • 20-24 lb turkey (unstuffed): about 4.5-5 hours at 325°F

These ranges are starting points, not guarantees — always finish by checking internal temperature, not the clock.

Frequently Asked Questions

How much turkey do I need per person?
Plan on 1 to 1.5 pounds of raw, whole turkey per guest. Use 1 pound per person if you're serving many side dishes or light eaters, and 1.5 pounds per person if you want generous leftovers. This is a "buy this much" rule, not an edible-meat yield — it already accounts for bone and cooking loss.
What internal temperature means the turkey is done?
The USDA safe minimum internal temperature for whole turkey is 165°F (74°C), measured with a food thermometer in the thickest part of the thigh without touching bone. Also check the breast and the innermost part of the wing. Time estimates are only a guide — temperature is the real test of doneness.
Does a stuffed turkey really take longer to cook?
Yes. Stuffing inside the cavity insulates the bird and slows how quickly heat reaches the center, so stuffed turkeys typically need 15-25 minutes longer than an unstuffed bird of the same weight. The stuffing itself must also reach 165°F for food safety, which is often the last part of the meal to come up to temperature.
Should I buy a bigger turkey "just in case"?
A modest buffer is fine, but going far above 1.5 lb/person mostly buys you leftovers, not insurance — cooking time and oven capacity scale with weight too. If you want backup food for a large gathering, a second small turkey or a turkey breast is often easier to manage than one oversized bird.

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