Bathroom Tile Area & Cost Calculator
Work out how much tile a bathroom needs — floor plus walls — add a waste factor for cuts and breakage, and price it at the dollars per square foot on your own quote.
Calculator
A 5×8 ft floor plus 0 sq ft of walls is 40 sq ft; at 10% waste order 44 sq ft ≈ $528.00 of tile.
Buying tile starts with one question: how many square feet, once you have allowed for cuts and breakage? A bathroom usually mixes a floor and one or more tiled walls, so you add the floor area to the wall area, pad the total with a waste factor, and only then price it — at the rate on your own quote, not a number this site made up.
Enter the floor length and width, the wall tile area (perimeter × height, or leave it at 0 for a floor-only job), pick a waste factor, and give your tile price per square foot. The tool returns the tiled area, the padded order quantity and the material and installed totals.
Formula
Area, then waste, then price:
area = (floor_l × floor_w) + wall_area\norder = area × (1 + waste%)\ntotal = (order × tile_price) + labor
You buy the order quantity, not the bare area — the waste factor covers cuts, pattern matching and the odd cracked tile.
Worked example
A 5 × 8 ft floor is 40 sq ft. With no wall tile and a standard 10% waste factor, you order 40 × 1.10 = 44 sq ft. At $12/sq ft that is 44 × 12 = $528 of tile.
Add a tiled wall by entering its area, bump the waste factor for a diagonal or patterned layout, or add setting labor — each flows straight into the totals.
Waste, boxes and buying tile
Waste is not optional. Every tile job wastes material on perimeter cuts, around fixtures and drains, and to breakage. A plain rectangular floor with a straight layout needs about 10%; a diagonal or patterned layout, lots of little cuts, or a small mosaic can want 12–15%. Large-format tile can waste more per cut. The waste factors table lists the labeled planning bands, and the general tile installation cost tool applies the same math to any room.
Buying in boxes. Tile is sold by the box, each covering a fixed number of square feet, so you round up to whole boxes: boxes = ceil(order ÷ sq ft per box). Buying a full extra box of the same lot is cheap insurance — dye lots vary, and having spares years later for a repair is worth far more than the leftover tile costs.
Floor and walls together. Measure the floor as length × width, and each tiled wall as its width × height, then add them. For a shower surround the walk-in shower tool computes the wall area from the perimeter for you.
This is a planning estimate on your prices and measurements — confirm the room before you order, and get an itemized quote for the setting labor.
Reference table
How the waste factor changes what you order for the 40 sq ft example floor:
Then round up to whole boxes and add a spare box from the same lot.