Tile Chart: 440 Tiles for 100 Sq Ft at 4 per Sq Ft

What does 440 tiles mean?

It means a 100-square-foot floor at 4 tiles per square foot needs four hundred and forty tiles once 10% waste is added: the floor is 100 × 4, which is 400 tiles, waste takes it to 440, and 440 ÷ 20 is exactly 22 boxes. The 1.10 is the whole story in miniature — cuts at the edges, a few broken tiles, and a little spare for later repairs all eat tiles, so the bare count alone understates the order: without waste the same floor needs exactly 400 tiles, and the waste 40 tiles are what keep the last row complete. The part people get wrong is ordering the exact figure when it is not a whole number of boxes: 440 tiles happen to divide evenly here, but a count like 495 tiles cannot be delivered as 495 tiles by most suppliers, and ordering 24 boxes leaves 15 tiles short.

Three things to check before you trust the number

Is the area really 100 square feet? Floors are rarely plain rectangles, so the measured area is where most orders go wrong: the 50-square-foot branch needs 220 tiles with waste, order 11 boxes, while the 200-square-foot branch needs 880 tiles, order 44 boxes, for the same coverage rate and waste. Measure each section separately, length times width, add them, and subtract large fixtures — a guessed area is the most expensive guess on the job.

Is the coverage rate really 4 tiles per square foot? The rate depends on tile size, and the count follows it exactly: the 2-per-square-foot branch needs 220 tiles with waste, order 11 boxes, while the 6-per-square-foot branch needs 660 tiles, order 33 boxes, for the same 100 square feet and waste. Check the rate against your tile — a 6-inch square tile gives 4 per square foot, a 12-inch tile gives 1, and a small mosaic gives far more — and a remembered rate can move the order by a whole box on a large floor.

Is 10% waste enough? Waste is the smallest input and the easiest to skimp on: the 0% branch needs 400 tiles, order 20 boxes, while the 20% branch needs 480 tiles, order 24 boxes, for the same floor and rate — on this floor the waste choice decides the box count by 4 boxes. For a floor laid diagonally, with many corners or an irregular shape, allow 15% or 20% instead of 10%: the extra tiles are cheaper than a second delivery, and spares are worth keeping for repairs.

Worked example

On the defaults: 100 square feet, 4 tiles per square foot, 10% waste.

1. Base tiles: 100 × 4 is 400 tiles.
2. Tiles with waste: 400 × 1.10 is 440 tiles.
3. Boxes: 440 ÷ 20 is exactly 22 boxes.

And the other way: the area behind 440 tiles is 100 square feet, the tiles per square foot behind 440 tiles are 4, and the waste behind 440 tiles is 10%.

Tile coverage lookup: area × tiles per sq ft at 10% waste (20 tiles per box)

Base tiles are area × tiles per sq ft; tiles with waste are base × 1.10; boxes are tiles with waste divided by 20 and rounded up, with a value landing exactly on a box boundary ordering that many boxes and not one more — so exactly 400 tiles order exactly 20 boxes.

Every branch, checked

• 50 sq ft area, 4 tiles per sq ft, 10% waste: 50 sq ft area, 4 tiles per sq ft, 10% waste: 220 tiles with waste — order 11 boxes.
• 200 sq ft area, 4 tiles per sq ft, 10% waste: 200 sq ft area, 4 tiles per sq ft, 10% waste: 880 tiles with waste — order 44 boxes.
• 100 sq ft area, 2 tiles per sq ft, 10% waste: 100 sq ft area, 2 tiles per sq ft, 10% waste: 220 tiles with waste — order 11 boxes.
• 100 sq ft area, 6 tiles per sq ft, 10% waste: 100 sq ft area, 6 tiles per sq ft, 10% waste: 660 tiles with waste — order 33 boxes.
• 100 sq ft area, 4 tiles per sq ft, 0% waste: 100 sq ft area, 4 tiles per sq ft, 0% waste: 400 tiles with waste — order 20 boxes.
• 100 sq ft area, 4 tiles per sq ft, 20% waste: 100 sq ft area, 4 tiles per sq ft, 20% waste: 480 tiles with waste — order 24 boxes.

The reverses, worked backwards

• Area behind 440 tiles: 100 sq ft — at 100 sq ft the figures are 440 tiles with waste — order 22 boxes.; at the lower neighbor the figures are 396 tiles with waste — order 20 boxes.; at the upper neighbor the figures are 484 tiles with waste — order 25 boxes..
• Tiles per sq ft behind 440 tiles: 4 tiles per sq ft — at 4 tiles per sq ft the figures are 440 tiles with waste — order 22 boxes.; at the lower neighbor the figures are 330 tiles with waste — order 17 boxes.; at the upper neighbor the figures are 550 tiles with waste — order 28 boxes..
• Waste behind 440 tiles: 10% waste — at 10% waste the figures are 440 tiles with waste — order 22 boxes.; at the lower neighbor the figures are 420 tiles with waste — order 21 boxes.; at the upper neighbor the figures are 460 tiles with waste — order 23 boxes..

What the defaults assume

The defaults are a 100-square-foot floor, 4 tiles per square foot and 10% waste, so the headline is a medium bathroom or small kitchen floor at the 6-inch-tile rate. The model is two multiplications and one round-up: area times rate for base tiles, times 1.10 for waste, divided by 20 and rounded up for boxes — with a tiny epsilon subtracted before the ceiling so a value landing exactly on a box boundary, like exactly 400 tiles, orders that many boxes and not one more. The area reverse is checked at 10 square feet either side, because 10 square feet at 4 tiles with 10% waste is 44 tiles; the rate reverse is checked at 1 tile per square foot either side, because 1 tile on 100 square feet with 10% waste is 110 tiles; the waste reverse is checked at 5 points either side, because 5 points on 400 tiles is 20 tiles. The model does not include grout, adhesive, underlayment, or waste beyond the allowance — for a diagonal layout or an irregular floor, allow 15% or 20% waste instead of 10%.

Output · formula · meaning

Who uses this

• A homeowner ordering tiles for a bathroom floor — 100 square feet at 4 per square foot is 440 tiles with waste, order 22 boxes.
• A builder checking a supplier quote — the lookup table gives base tiles, tiles with waste and boxes for four areas and four coverage rates.
• Someone choosing a tile size — the 2 and 6 branches show what a larger or smaller tile is worth on the same floor.
• A buyer checking a delivery quote — the reverses give the area, rate or waste behind any quoted tile count.

Accuracy & limitations

Figures are the model’s own arithmetic on the numbers you type, computed from unrounded values and displayed rounded HALF_UP to 2dp, with boxes rounded up to whole boxes of 20. The main limitation is the job itself, not the arithmetic: fixtures, corners, diagonal layouts and breakage all move the real order, and the 10% waste figure is a standard allowance, not a measurement of your floor. This page is a calculation tool, not a materials quote.

Cite this calculator

A 100 sq ft floor at 4 tiles per sq ft needs 400 tiles, or 440 with 10% waste, so order 22 boxes of 20 tiles. Source: Bright Side Kit, https://brightoolbox.com/tile-chart/, accessed 29 October 2026.

Frequently asked questions