Estimate turkey cook time, fridge defrost time, and servings from turkey weight for stuffed or unstuffed birds at 325°F with a simple guide.
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Turkey Formula
The turkey calculator estimates turkey size, roasting time, refrigerator thawing time, cooking temperature, and servings. It uses a 325°F roasting temperature and a serving estimate of 1.5 pounds of turkey per person.
No roasting time is extrapolated outside the whole-turkey chart’s 8–24 lb range.
- Turkey Size: the weight of the turkey in pounds.
- People: the estimated number of people the turkey will feed.
- 1.5: pounds of turkey per person, allowing for generous servings or some leftovers.
- Defrost Time: estimated refrigerator thawing time in hours.
- 24: hours of refrigerator thawing time per 4 to 5 pounds of turkey.
- Cook Time: estimated roasting time in hours at 325°F.
Choose turkey weight or number of people. The calculator estimates refrigerator thawing and servings, then looks up roasting time for whole turkeys from 8 to 24 lb. The people mode first estimates whole-turkey weight using the planning assumption of 1.5 lb per person.
For cook time, the calculator uses the federal whole-turkey roasting chart at 325°F for completely thawed birds from 8 to 24 lb. At an exact shared endpoint it combines the adjacent ranges; the chart itself does not specify a tie-break rule. Outside this range, follow the turkey and appliance manufacturer’s instructions. Times are planning estimates, never a substitute for a food thermometer.
Turkey Roasting and Thawing Reference
These tables show the main values behind the calculator estimates. Cook time is only an estimate. Use a food thermometer to confirm doneness.
| Turkey Weight | Unstuffed Cook Time at 325°F | Stuffed Cook Time at 325°F |
|---|---|---|
| 8 to 12 lb | 2.75 to 3.00 hours | 3.00 to 3.50 hours |
| 12 to 14 lb | 3.00 to 3.75 hours | 3.50 to 4.00 hours |
| 14 to 18 lb | 3.75 to 4.25 hours | 4.00 to 4.25 hours |
| 18 to 20 lb | 4.25 to 4.50 hours | 4.25 to 4.75 hours |
| 20 to 24 lb | 4.50 to 5.00 hours | 4.75 to 5.25 hours |
| Estimate | Rule Used | Example |
|---|---|---|
| Turkey size | 1.5 lb per person | 10 people need about 15 lb |
| People served | Turkey weight ÷ 1.5 | 15 lb feeds about 10 people |
| Fridge thaw time | 24 hours per 4 to 5 lb | 15 lb takes about 72 to 90 hours |
Turkey Calculator Examples
Example 1: 16 lb unstuffed turkey
Suppose you have a 16 lb turkey and it is not stuffed.
- Cook time: the 16 lb turkey falls in the 14 to 18 lb unstuffed range, so the estimate is 3.75 to 4.25 hours.
- Defrost time: (16 ÷ 5) × 24 = 76.80 hours to (16 ÷ 4) × 24 = 96.00 hours.
- People served: 16 ÷ 1.5 = 10.67 people.
Example 2: Turkey size for 12 people
Suppose you need to feed 12 people.
- Turkey size: 12 × 1.5 = 18 lb.
- If unstuffed, cook time: 18 lb is shared by two chart bands, so the calculator combines them into 3.75 to 4.50 hours.
- Defrost time: (18 ÷ 5) × 24 = 86.40 hours to (18 ÷ 4) × 24 = 108.00 hours.
Turkey Calculator FAQ
How much turkey should you plan per person?
A common estimate is 1.5 pounds of turkey per person. This gives a generous serving and may allow for leftovers. If you want smaller portions with fewer leftovers, you could plan closer to 1 pound per person, but the calculator uses 1.5 pounds per person.
Is the estimated cook time enough to know the turkey is done?
No. Cook time is only a planning estimate. The turkey is done when a food thermometer reads 165°F in the thickest part of the breast, thigh, and wing. If the turkey is stuffed, the center of the stuffing must also reach 165°F.
How long does it take to thaw a turkey in the refrigerator?
The calculator uses the guideline of about 24 hours for every 4 to 5 pounds of turkey in a refrigerator at 40°F (4°C) or below. For example, a 20 lb turkey needs about 96 to 120 hours, which is about 4 to 5 days. Never thaw on the counter. A refrigerator-thawed turkey can remain refrigerated for 1 to 2 more days before cooking.
