Enter area, tile size, and boxes. We will estimate tiles, boxes, and cost. Add a waste factor for cuts and pattern.
Tiles are sold in different formats, and every room has quirks—doorways, alcoves, diagonal patterns, you name it. This tile calculator helps you quickly size up how many tiles to buy, how many boxes that equals, and a rough budget based on either price per tile or price per box. You can work in US units (feet/inches) or metric, switch between a single rectangular room and multiple areas, and add a waste allowance for cuts, breakage, and pattern offcuts. If you want a visible grid, the layout helper shows approximate tiles across length and width for a simple rectangle, so you can spot awkward slivers in advance. For related planning, you might also want our Square Footage Calculator to measure rooms accurately, our Paint Calculator for post-tiling touch-ups, and the Concrete Calculator if you’re prepping a slab or mud bed.
Pick your unit system first. In the Tile and box section, enter the nominal tile size and an estimated grout gap. For a simple count, the calculator uses area math, which is fast and accurate for ordering. If you want a sense of how tiles land across the room, toggle the layout helper and it will show approximate counts across length and width—handy for spotting narrow slivers at walls. Next, add your area: either use Single rectangle or switch to Multiple areas to total hallways, closets, or separate rooms. Subtract obstacles like stairwells or fireplaces by adding openings. Finally, set a waste allowance (5–15% is typical), and choose your pattern—diagonal and herringbone usually need more overage. If you know the tiles per box, we’ll round up to full boxes, and you can enter price per tile or per box to get an order estimate. Save your numbers with the CSV download.
The summary shows total area used in square feet, your pattern and waste selections, and the final tile count rounded to a whole number (and to whole boxes if you provided a box size). The boxes and cost panel breaks out tiles per box, boxes to buy, and an estimated cost based on whichever price you supplied. Because we use area-based math, grout width doesn’t change total area; it mainly affects the layout look and joint spacing. If the layout helper indicates awkward slivers, consider adjusting your starting line or switching tile size to improve the cut symmetry. Always keep a couple extra boxes for future repairs, dye-lot matching, and breakage—especially for natural stone and patterned porcelain. After you finish planning tiles, you can size paint with our Paint Calculator and confirm areas with the Square Footage Calculator.