The cooking time to cook roast beef in the oven is around 45 minutes to an hour depending on the size of roast beef you're cooking.
The larger the roast beef dish you're cooking the longer it will take.
But it takes around 40 minutes to be medium done and around 45 to 60 minutes for well done roast beef in the oven.
The cooking temperature for roast beef in the oven is 425 F degrees.
While preparing the roast beef for baking preheat your oven to a temperature of 425 F degrees.
Then once ready put the roast beef in the oven on the middle rack for best cooking results and set a timer for 45 minutes to 60 minutes.
Once the roast beef has been in the oven for at least an hour the roast beef will be fully cooked and ready to eat.