Worked example: tile count, boxes, thinset, grout, and material total
The default project is 10 ft by 8 ft with no extra area, so base area is 10 x 8 + 0 = 80 sq ft.
Straight lay adds 10% waste. Order area is 80 x 1.10 = 88 sq ft.
Each default tile is 24 in by 12 in, or 2 ft by 1 ft, so tile area is 2 sq ft. Tile count is ceil(88 / 2) = 44 tiles.
Boxes are ceil(88 / 16) = 6. Thinset bags are ceil(88 / 80) = 2. Grout bags are ceil(88 / 120) = 1.
Tile cost is 88 x $5.50 = $484. Supply cost is 2 x $28 + 1 x $22 + $45 = $123. Material total is $484 + $123 = $607.
How to estimate tile count and tile order area
Base area is length x width plus extra area. Order area is base area x (1 + total waste / 100). Tile count is rounded up from order area divided by the area of one tile.
How to choose tile size, layout pattern, and waste buffer
Large straight-lay tiles usually need less waste than diagonal, herringbone, niches, borders, and small-cut layouts. The pattern preset and extra buffer are additive so you can model a conservative order.
How to calculate thinset and grout quantities
Thinset bags are rounded up from order area divided by thinset coverage. Grout bags are rounded up from order area divided by grout coverage. Actual coverage can change with trowel size, tile thickness, joint width, and surface condition.
How to read the tile material total and round-up effects
The material total includes tile cost, thinset bags, grout bags, and the spacer or edge reserve. Box count and bag count are rounded up because suppliers usually sell complete boxes and complete bags.
What to verify before buying tile
Confirm substrate condition, waterproofing, transitions, edge profiles, trim pieces, batch numbers, lead time, return policy, and whether the installer wants extra attic or garage stock for repairs.