Will your door hit the furniture? Swing it and see

A door that opens into a room sweeps a quarter circle on the floor as wide as the door leaf, and furniture that fits on a plan can still stop it dead. Drag a wardrobe, armchair and chest of drawers around a small room, change the door width and hinge side, and watch where the door first touches something.

You'll see how much clear floor your own door really needs, plus cheap fixes that don't mean buying anything.