The Space Calculator is a handy tool that will help you to get a sense of the usable square feet in your current location, the minimum amount of space that meets your needs, and how much space you would ideally like to have in your next location. It can also be helpful when you’re reviewing a lease to determine how much you are paying for usable vs. common space in a multi-tenant building, when negotiating tenant improvements (T.I.) to your current space, or to put parameters on the search for new space.