This calculator uses USDA-recommended roasting times by weight, adjusted for stuffed vs unstuffed preparation and oven temperature (325°F or 350°F). Times represent a safe range based on standard whole turkey roasting in a conventional oven.
Time Adjustments
325°F is the USDA minimum recommended oven temperature for roasting turkey
350°F reduces roasting time by approximately 15-20 minutes compared to 325°F
Stuffed turkey adds 30-45 minutes because the stuffing must also reach 165°F
A frozen or partially frozen bird will take significantly longer - always fully thaw first
Roasting bags and covered pans reduce time; convection ovens reduce time by 10-15%
Example Calculation
You have a 15-pound unstuffed turkey and are roasting at 325°F. Dinner is planned for 4 pm.
Turkey weight15 lbs
PreparationUnstuffed
Oven temperature325°F
Estimated roasting time3 hr 45 min - 4 hr 15 min
Minutes per pound15-17 min/lb
Required rest time45-60 min
Oven in by: 7:45 am (for 4 pm dinner)
With a 4 hr 15 min max roasting time plus 45-60 minutes of rest, putting the turkey in at 7:45 am gives a safe 8+ hour buffer. Start checking temperature at 10:30 am (3 hr 45 min mark). The turkey should be out of the oven by 12:30 pm at the latest, resting until the 1:15-1:30 pm carving window - well ahead of the 4 pm dinner.
Frequently Asked Questions
The USDA recommends roasting turkey at 325°F as the minimum safe oven temperature. Some cooks use 350°F for a slightly faster cook with more browning. Higher temperatures (400°F+) can brown the skin quickly but risk drying out the breast before the thighs reach safe temperature. A common approach is to start at 425°F for 30 minutes to brown the skin, then reduce to 325°F for the remainder of the cook.
USDA Food Safety and Inspection Service - Turkey Basics: Safe Thawing
Official USDA guidelines for safe turkey preparation, roasting times by weight, and the 165°F safe internal temperature requirement.
2
USDA FSIS - Let's Talk Turkey
Detailed cooking time charts for whole roasted turkey at 325°F, stuffed and unstuffed, covering birds from 8 to 24 pounds.
3
USDA Food Safety and Inspection Service - Safe Minimum Internal Temperature Chart
Reference for safe minimum internal temperatures for poultry including turkey: 165°F for all parts.
HR
Hassaan Rasheed
Developer and Researcher, CalculatorFlux
Researches and verifies the formulas, methodology, and source data behind each calculator on CalculatorFlux. All tools are built and checked against the cited references before publication.
Last updated: May 2026
Roasting Time at 325°F
Unstuffed
Weight
Time
6-8 lbs
2.25-3 hr
8-12 lbs
2.75-3 hr
12-14 lbs
3-3.75 hr
14-18 lbs
3.75-4.25 hr
18-20 lbs
4.25-4.5 hr
20-24 lbs
4.5-5 hr
Add 30-45 min for stuffed. Source: USDA FSIS.
Safe Temperature Guide
Turkey thigh
165°F / 74°C
USDA minimum
Turkey breast
165°F / 74°C
Often reaches first
Stuffing (if used)
165°F / 74°C
Critical safety check
Rest carryover
+5-10°F
After removing from oven
Pro Tip
Always plan around the maximum roasting time, not the minimum. It is easy to keep a done turkey warm and resting for an extra hour, but running late on a Thanksgiving turkey creates real problems. Build a 90-minute buffer into your schedule.