How Long Do You Cook A Pork Loin

ByLily

Pork loin is a lean cut that benefits from moderate oven temperatures and careful monitoring to avoid dryness. So how long do you cook a pork loin? The short answer is roughly 20 to 27 minutes per pound at 350°F, but the real answer depends on the size of your roast, whether it’s boned or bone-in, and the doneness you prefer.

This guide breaks it all down with times, temps, and simple steps. By the end, you’ll know exactly when to pull your roast from the oven.

How Long Do You Cook A Pork Loin

At 350°F, a boneless pork loin needs about 20 to 27 minutes per pound. A bone-in roast runs a bit faster since the bone conducts heat. For a 3-pound boneless loin, plan on 60 to 80 minutes total.

Always cook to temperature, not just time. The USDA recommends a minimum internal temp of 145°F, followed by a 3-minute rest. Many home cooks pull theirs at 140°F and let carryover cooking finish the job.

Pork Loin Cooking Time Chart By Weight

Use this quick reference for a 350°F oven. Times are estimates, so check with a thermometer near the end.

  • 1 to 2 pounds: 25 to 30 minutes
  • 2 to 3 pounds: 40 to 60 minutes
  • 3 to 4 pounds: 60 to 80 minutes
  • 4 to 5 pounds: 80 to 100 minutes
  • 5 to 6 pounds: 100 to 120 minutes

Bone-in roasts usually cook 5 to 10 minutes faster per pound. Rolled and tied loins can take a little longer because of their uneven shape.

What Temperature Should You Cook Pork Loin To

Target 145°F in the thickest part of the meat, away from bone and fat. This gives you a juicy center with a faint blush of pink, which is perfectly safe.

If you prefer a firmer texture, take it to 150°F. Anything past 160°F will taste dry and chalky, so watch it closely.

How Long To Cook Pork Loin At Different Oven Temperatures

Not everyone wants to use 350°F. Here’s how other temps stack up per pound.

  • 325°F: 25 to 30 minutes per pound
  • 350°F: 20 to 27 minutes per pound
  • 375°F: 18 to 22 minutes per pound
  • 400°F: 15 to 18 minutes per pound
  • 425°F: 12 to 15 minutes per pound

Higher heat gives you better browning but less margin for error. Lower heat is more forgiving for beginners.

Step-By-Step: Cooking A Juicy Pork Loin

Follow these steps for a reliable roast every time.

  1. Let the loin sit at room temperature for 30 minutes before cooking.
  2. Pat it dry with paper towels so the surface browns well.
  3. Season generously with salt, pepper, garlic, and herbs.
  4. Preheat your oven to 350°F and place the rack in the middle.
  5. Set the loin fat-side up in a shallow roasting pan.
  6. Roast uncovered until the internal temp hits 140°F to 145°F.
  7. Rest the meat for 10 to 15 minutes before slicing.

The rest is not optional. It lets the juices redistribute so they stay in the meat instead of running onto the board.

Should You Sear Pork Loin First

Searing is a nice touch but not required. A quick sear in a hot skillet for 2 to 3 minutes per side builds a deeper crust.

If you sear first, subtract a few minutes from the oven time. The meat is already partly cooked when it goes in.

Using A Meat Thermometer The Right Way

Stick the probe into the thickest part, avoiding bone and fat. Check in two spots if your roast is uneven.

Start checking about 10 minutes before your estimated finish time. Ovens run hot or cold, and every roast is a little different.

Common Mistakes That Dry Out Pork Loin

Avoid these traps and your roast will stay moist.

  • Cooking to time only instead of temperature
  • Skipping the rest period
  • Using too high a heat for a long roast
  • Slicing while the meat is still steaming hot
  • Buying a loin when you meant a tenderloin (they cook very differently)

Pork tenderloin is much smaller and cooks in 20 to 30 minutes total. Don’t mix up the two cuts.

How To Keep Leftovers Moist

Store sliced pork in an airtight container with a spoonful of pan juices or broth. It keeps for 3 to 4 days in the fridge.

Reheat gently at 300°F or in short bursts in the microwave. High heat dries it out fast.

Quick Tips For A Better Roast

  • Brine the loin for 1 to 2 hours for extra moisture.
  • Add root vegetables to the pan for a one-dish meal.
  • Cover loosely with foil if the top browns too fast.
  • Let the roast rest before you carve it.

With the right temp and a good thermometer, pork loin is one of the easiest roasts you can make. Aim for 145°F, rest it well, and slice against the grain.

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