How Long to Cook a Pot Roast in Oven


When I was a kid, my mom would often get us to help with dinner. She’d hand me a pot roast and say, “it’s been in the oven for three hours now; let’s see if it’s done yet!” So we’d pull out the pot roast, look at it and say “nope” then put it back in for another hour or so. This is one of those recipes where you have to wait for something to happen that you can’t see or feel—in this case, how long does it take for a pot roast to cook?

Frozen pot roast

When you’re cooking a frozen pot roast, there are a few things to keep in mind. First, put your pot roast in the cold oven and let it cook at 350 degrees F for 3 hours or until the internal temperature reaches 160 degrees F on a meat thermometer.

Second, check the temperature every 30 minutes or so until you reach 160 degrees F. If your oven’s temperature is off by 10 degrees, then adjust accordingly when checking doneness (i.e., if your roast needs another hour but is at 150 degrees F after 2 hours in the oven).

A cold oven

When you’re ready to cook, preheat your oven to 325°F (163°C) and place the roast in the center of a cold oven. Set it for 4 hours at this temperature, then remove from heat and let rest for 10 minutes before slicing.

A room temperature oven


Preheat the oven to 325 degrees Fahrenheit. Place the roast in a roasting pan, fat side up, and place it in the oven. Set a timer for 3 hours (or until your meat thermometer reads 160 degrees F).

It takes about 3 hours to cook a pot roast in the oven.

The average cooking time for a pot roast in the oven is three hours. The exact cooking time will depend on the size of your meat, and how hot your oven runs. You want to cook your pot roast until it reaches an internal temperature of 165 degrees F.


So, there you have it! The answer to the question “How long does it take to cook a pot roast in the oven?” is three hours. The best way to ensure that your roast turns out perfectly is by following these tips:

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