Gather a tape measure, notepad, and pencil
Measure the room’s length from wall to wall
Measure the room’s width from wall to wall
Measure the room’s height from floor to ceiling
Measure each wall separately if the room is not a perfect rectangle
Measure the locations and sizes of doors
Measure the locations and sizes of windows
Measure the distance from each door and window to nearby corners
Measure any alcoves, recesses, or built-in features
Measure the space taken by radiators, vents, outlets, and switches
Measure the size of the furniture you want to place
Compare furniture dimensions to the available floor space
Leave clearance for walking paths and door swings
Mark measurements on a simple floor plan
Double-check all measurements before buying furniture