A good rule to go off of is the 1/3 rule. The 1/3 rule states that your housing expenses should be equal but no greater than 1/3 of your total monthly income. The includes not just rent, but utilities, parking, and maintenance fees as well, or any expense related to where you live.
The rent calculator found below will help you properly budget for taking on a rent payment. This tool allows you to input your monthly income and it will help you determine how much you are able to pay. From there you can narrow your search to apartments that fit within your budget so you can maintain a healthy quality of life.