Should I rely on time alone?

No — always probe. A 12 lb turkey can vary ±30 min based on starting temp and oven calibration.

Brined poultry cooks 5-10% faster (water content alters thermal mass). Adjust expectations slightly down.

Is convection faster?

Yes — drop temp 25°F (or shorten time 10-25%) on a convection setting. Don't double-count both.

Why does USDA recommend 165°F?

Salmonella in poultry dies in <1 sec at 165°F. Lower temps held longer also work (e.g. 150°F for 3 min) but are harder to verify at home.

Cook Time By Weight Calculator

Estimate roast / turkey / chicken / ham cook time per USDA weight × min/lb table.

Result

Estimated cook time

3h 0m

Oven 325°F · pull at internal 165°F.

Itemturkey unstuffed
Weight12 lb
Min per lb15
Total minutes180
Time3h 0m
Oven temp325°F
Safe internal165°F

Step-by-step

12 lb × 15 min/lb = 180 min.
Convert to hours/minutes: 3h 0m.
Oven at 325°F; pull when internal hits 165°F (USDA safe).

How to use this calculator

Enter weight in pounds.
Pick item.
Use as planning estimate; verify with internal temp.

About this calculator

Cook-time-by-weight rules of thumb come from USDA: 15 min/lb for unstuffed turkey at 325°F, 20 min/lb for medium beef roast, 25 min/lb for pork loin. These are rough — final doneness is determined by internal temp (165°F poultry, 145°F pork/medium beef). Use min/lb to set timer expectations and pull schedule; use a probe thermometer for actual doneness. Always rest meat 10-30 min after cooking — internal temp continues rising 5-10°F during the rest.