HesapHanem

Carpet Tile Calculator

Enter room dimensions, tile size and waste to find how many carpet tiles you need.

How it is calculated

The room length and width are entered in feet and the tile side in inches (square tiles only); waste is a percentage and defaults to 0 if left blank. The tool works out room area = length × width in sq ft, tile area = (side ÷ 12)² in sq ft, then tiles = ⌈(room area ÷ tile area) × (1 + waste ÷ 100)⌉. The result is always rounded up to a whole tile. Length, width and tile size must all be greater than zero, otherwise no result is shown. Areas are printed in square feet. The tool counts tiles, not boxes, so you still convert to boxes yourself.

Worked example

A room 15 ft by 12 ft with 24 inch tiles and 10% waste. Room area = 15 × 12 = 180 sq ft. One tile is 24 ÷ 12 = 2 ft on a side, so its area is 4 sq ft. The base count is 180 ÷ 4 = 45 tiles. Adding 10% gives 45 × 1.10 = 49.5, which rounds up to 50 tiles. The tool shows 50 tiles, a room area of 180.00 sq ft and a tile area of 4.000 sq ft. With 0% waste the answer would be exactly 45.

Try this example →

Common mistakes

  • Entering the room in metres or the tile in centimetres. The fields expect feet and inches; a 50 cm tile is about 19.7 inches, and 10 m is about 32.8 ft.
  • Typing the tile size in feet (2) instead of inches (24). The tile would then count as 2 inches wide and the tile total balloons.
  • Leaving waste at 0 for a room with doorways, alcoves or a diagonal layout. Tiles cut at the edges are rarely reusable, so the plain area ratio comes out short.
  • Using the result as a box count. Tiles are sold in boxes of a fixed number, so round the tile total up to whole boxes.
  • Entering an L-shaped or irregular room as one rectangle of its longest sides. Split it into rectangles, calculate each, and add the tile counts.

About this calculator

The carpet tile calculator divides your room's floor area (length and width in feet) by the area of a single square carpet tile (side length in inches — commonly 24×24 in, about 61×61 cm, or the metric 50×50 cm, about 19.7 in) to get the base tile count, then adds the waste allowance you enter as a percentage, typically 5–10%, to cover cuts around doorways, alcoves, and edges where full tiles won't fit. The result is a whole number of tiles, rounded up.

Because carpet tiles (also called carpet squares) are sold and priced per box of a fixed count, underestimating leaves you short mid-installation with a possible dye-lot mismatch on the reorder, while overestimating wastes money on unused stock. Flooring contractors, office-fitout installers, and DIY homeowners use this calculator before ordering, then round the tile count up to full boxes and choose a higher waste percentage for rooms with a complex layout.

Was this helpful?

You can pick up to 3 reactions.

Comments (1)

  • Editorial team

    The tile field is in inches, so metric tiles need converting first. For 50 by 50 cm tiles type 19.685, and the tile area then reads 2.691 sq ft. Choose the waste percentage to suit the layout: a plain pattern wastes less than a directional or diagonal one. The count is in tiles, not boxes, so divide by the pack size on the label. What tile size and layout are you planning, and what waste did you settle on?

Popular calculators

Loan Calculator

Monthly payment, total interest and full amortization schedule.

Percentage Calculator

Percent change, percent of, and ratio calculations.

Discount Calculator

Calculate final price, savings, and discount amount.

BMI Calculator

Body mass index from height and weight (metric or imperial).

Age Calculator

Compute your exact age in years, months and days from a birth date.

Compound Interest Calculator

Calculate the final amount and interest earned with compounding.

All Calculators