How wide should a walkway be? Drag the furniture and see

A room can have plenty of floor and still feel cramped when one gap, between the sofa and the wall, say, is too narrow to walk through comfortably.

Enter your room's size, drag the furniture around a top-down plan, and watch the planner find the widest route from door to window and ring the tightest spot. Learn the rules of thumb for everyday and side routes, how to tape out a layout before you buy, and when it's fine to break them.