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Pork Roast Cooking Time Calculator

Estimate roasting time for turkey, chicken, beef, pork, ham and lamb from weight and oven temperature, with USDA safe internal temperatures and rest times.

These figures follow published USDA roasting guidelines, not a measurement of your oven: actual time depends on your oven's true calibration, whether the meat started refrigerator-cold or at room temperature, and the exact cut. Always confirm doneness with a meat thermometer instead of the clock. For converting a recipe's cups and grams, see this site's cooking measurement converter.

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Result

This page opens the meat cooking time calculator with pork roast preselected, using the USDA-guideline rate of about 20 minutes per pound at 325°F (163°C). Enter your roast's weight in pounds or kilograms for an estimated total time, the USDA safe internal temperature, and a rest recommendation.

USDA lowered its recommended pork temperature to 145°F (63°C) with a 3-minute rest back in 2011, down from the older 160°F guidance that produced notoriously dry, grey pork — a whole pork roast cooked to 145°F and rested properly is safe and noticeably juicier than the well-done pork many people grew up with.

That 145°F figure is for whole cuts like a loin or shoulder roast — ground pork still needs 160°F (71°C), since grinding can distribute surface bacteria through the meat. For this whole-roast calculator, check the thickest part with a thermometer, rest it the full 10 to 15 minutes, and expect the internal temperature to climb a few more degrees during that rest.

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Accepted Formats & Rules

  • Seven meat profiles with honest per-pound roasting rates at the USDA-standard 325°F (163°C) oven, converted live for kilograms.
  • Doneness choice for beef roast (rare through well done) with the USDA 145°F (63°C) minimum always shown alongside it.
  • Oven-temperature adjustment for 325°F, 350°F and 400°F, safe internal temperature in °F and °C, and a rest-time range.

Key Benefits

✓ Real USDA-guideline roasting rates for seven meats — turkey, whole chicken, chicken breast, beef roast, pork roast, precooked ham and leg of lamb — not one generic "X minutes per pound" rule for everything.
✓ Shows the USDA minimum safe internal temperature and a recommended rest time for the exact meat you picked, so the clock and the food-safety number are never disconnected.
✓ Runs entirely in your browser: pick a weight unit (lb or kg) and oven temperature, get an estimate instantly — no account, no upload.

Use Cases

  • • Work out how long to roast this year's Thanksgiving turkey from its weight, with the USDA-safe 165°F pull temperature and a 20-30 minute rest before carving.
  • • Compare beef roast timing across doneness levels — rare through well done — and see USDA's 145°F minimum safe temperature for whole cuts alongside your chosen doneness.
  • • Figure out how long to reheat a precooked spiral ham without drying it out, using USDA's 140°F reheating target instead of the higher raw-pork temperature.