Meat Cooking Time Calculator

What changes how long meat takes to cook

Three things decide the cooking time for a roast or a bird: what cut you bought, how much it weighs, and how hot the oven is. The calculator above takes the first two and returns the time, the oven setting and the internal temperature to aim for.

The federal roasting charts set a floor of 325°F for the oven. The USDA does not recommend roasting meat or poultry below 325°F, because at lower temperatures the food sits too long between 40°F and 140°F, the range where bacteria multiply fastest. That range is often called the danger zone, and the advice comes from the USDA's guide to roasting meats.

Two other details move the clock. A boneless rolled roast takes longer per pound than the same cut with the bone in, because heat has to travel through solid meat instead of around a bone. And a half ham or a half roast takes longer per pound than a whole one, because it has more surface area for its weight and dries out faster. Plan by minutes per pound and then confirm with a thermometer, never by the clock alone.

Worked example: a 5 pound bone-in rib roast

Say you bought a 5 pound bone-in beef rib roast for a Sunday dinner and you want to sit down at 6:00 p.m.

• Rate: 23 to 25 minutes per pound at 325°F
• Total time: 5 x 24 = 120 minutes, about 2 hours
• Safe internal temperature: 145°F, then rest 3 minutes
• Rest before carving: 15 to 20 minutes for a roast this size

Work backwards from 6:00 p.m. The roast needs a 20 minute rest, so it comes out at 5:40. Two hours of cooking puts it in the oven at 3:40, with the oven preheated by 3:25. Season it and let it sit at room temperature for 30 minutes first if you have the time, then roast it on a rack in a shallow pan.

Now compare the same 5 pound weight across cuts, which is why the answer to "how long do I cook a roast" depends on the animal. A 5 pound boneless rib roast runs 28 to 33 minutes per pound, or about 150 minutes. A 5 pound pork loin roast at 350°F takes 20 minutes per pound, about 100 minutes. Same weight, but different clocks.

Worked example: a 12 pound turkey

A 12 pound unstuffed turkey at 325°F:

• Time: 3 to 3 3/4 hours, roughly 15 to 19 minutes per pound
• Safe internal temperature: 165°F
• Where to check: the innermost part of the thigh, the innermost part of the wing and the thickest part of the breast
• Rest: 20 minutes before carving

If the bird is stuffed, the chart adds 30 minutes and you also have to check that the center of the stuffing reaches 165°F. The USDA suggests baking stuffing in a separate dish so it heats evenly, and that is the easier route for a big bird.

Work backwards from a 4:00 p.m. dinner. A 20 minute rest means the turkey comes out at 3:40, and about 3 1/2 hours of cooking puts it in the oven at 12:15. Thaw it first: a 12 pound turkey needs 3 to 4 days in the refrigerator, or 6 to 8 hours in cold water with the water changed every 30 minutes.

Roasting times and temperatures at a glance

Times from the federal roasting charts, for an oven set to 325°F unless noted. All whole cuts of beef, pork, lamb and veal cook to 145°F with a 3 minute rest.

These figures are the federal charts for whole cuts. Ground meat and sausage are a different case: ground beef, pork, lamb and veal all cook to 160°F, and ground poultry to 165°F. See the meat and poultry roasting charts for the full tables.

Safe internal temperatures, by meat

Time gets you close. Temperature tells you when the food is safe, and it is the number that matters if you only track one.

Rest time is not a style choice. For whole cuts, the temperature keeps rising a few degrees after the meat leaves the oven, and a 3 minute rest lets the juices redistribute so they stay in the meat instead of running onto the board. The full list is on the safe minimum internal temperature chart.

Why the thermometer beats the clock

Oven dials run hot or cold, and a roast's shape means the center cooks more slowly than the edges. If you go purely by time you will either carve meat that is raw in the middle or serve a dry roast that hit 175°F while you waited. A basic instant-read thermometer costs about $15 and removes the guesswork.

Insert the probe into the thickest part of the meat, away from bone, fat and any stuffing. Bone conducts heat faster than muscle, so a reading taken next to the bone can run 10°F ahead of the actual meat. For poultry, check three spots: the innermost thigh, the innermost wing and the thickest part of the breast. If any of them reads under 165°F, put the bird back in.

Once the meat is cooked, the clock restarts. Keep hot food above 140°F, refrigerate leftovers within two hours, and reheat them to 165°F. If you are cooking for someone who is pregnant, elderly or immunocompromised, lean on the thermometer rather than the timer and skip any pink-in-the-middle guesswork.