How Tile Layout Centering Works
Starting tile installation from one edge often results in a very small cut piece on the opposite end — which looks unprofessional. Centering the layout ensures both ends have equal, symmetric cuts.
This calculator finds the total number of tiles needed, the width of cuts at each end, and the starting offset — the distance from the wall edge where the first full tile begins.
If the end cut is less than one-third of the tile width, you'll see a warning. In that case, shift your starting point by half a tile to increase the end cut size.
Frequently Asked Questions
For floor tiles: 3/16 to 1/4 inch (5–6 mm). For wall tiles: 1/8 inch (3 mm). Large-format tiles (24 in+) often need 3/16 inch or wider joints to accommodate size variation.
Shift your start point by half a tile width. This makes what was a sliver at one end become a larger piece at both ends. Aim for end cuts no narrower than one-third of the tile width.
Yes. Run this calculator once for the wall's width and once for its height to get starting points in both directions. For square tiles both calculations use the same tile size.