How can you calculate if a sofa will fit through your door?

To determine if a sofa will fit through your door, measure the width and height of both the doorframe and the sofa. First, check if the sofa can pass through the door when upright; if not, measure its diagonal length when tilted. Additionally, consider any obstacles like door handles or frames that may affect the fit. If the sofa's dimensions are smaller than the door's dimensions or can be maneuvered through by tilting, it should fit.