If you have tile of 1 by 1 foot and a 180 square foot room you ll need about 180 tiles.
How to square a room for floor tile.
Snap two perpendicular lines over the middle of the floor with your chalk snap line so they intersect at the center and divide the floor into four squares.
Use a chalk line to extend this line from one side of the room to the other.
Use a laser square to pencil a line between these marks and nail down the first row with its tongue edge against this line.
Arrange the tiles outward from the center of the room.
Rake the notched edge of the trowel through the thinset creating furrows.
Set the tiles back.
Step 2 lay out two lines of tiles without mortar starting at the intersection and building toward the walls.
Beginning at the center of the room rather than at the walls will prevent you from ending up with gaps or unsightly narrow tiles around the outer perimeter of the room.
To square a room use a tape measure to find the distance from one corner to the other then measure the diagonal between the remaining 2 corners.
To get started place a tile at each of the 4 corners where the wall lines intersect.
Square your layout to the room entryway how to square for tiling measure between the two marks and mark the center point.
Hold one end of the string at one of the new x marks as a pivot.
Stretch your chalk line s string across the room from the third to the fourth x to intersect with the first chalk line on the floor.
Lift the tiles at the center of the room and spread a layer of thinset the same thickness as the tiles.
Snap another chalk line.
Multiply the length times the width to determine the room s square footage.
Draw a line parallel to the entrance across the three marks using the longest straightedge available.
Set a square at the intersection to ensure they re perpendicular to each other.
If the 2 measurements are the same then your room is already squared.
Mix the thin set mortar.
Dry run the tiles.
Measure half of each distance from one wall to the center of the floor and make marks on the moisture barrier.