Cooking bacon or baking bacon in the oven takes between 12 to 16 minutes depending on how well done you want the bacon to be.
When I bake or cook chicken in the oven it takes 15 minutes for the bacon I cook in the oven to be well done enough for me.
You can preheat the oven to 350 F while preparing the bacon and place the bacon on a baking sheet or baking pan and let the bacon cook for 12 minutes and then check the bacon to see if it's done enough and if not close the oven door and let the bacon bake for another 4 to 5 minutes.
Bacon should be fully cooked after 15 to 16 minutes in the oven but the bacon is cooked enough to safely eat after 12 minutes in the oven.
But sometimes you might want to cook the bacon a bit longer depending on how well done you like it.