Modular Carpet Tile Layout Calculator

SettingsSettings for this calculationUS

Market

Imperial · sales tax

Who is doing the work?

Waste is set to 7% by hand. Pick a tier above to replace it, or keep your own figure.

Floor Area

The total floor area to be covered with carpet tiles.

Measure the room's length x width, or add up multiple sections for an irregular area.

Carpet Tile Size (square)

The side length of a single square modular carpet tile.

The field opens on a 50 × 50 cm tile in metric, the common size in the UK and Europe, and a 24 × 24 in tile in imperial, the common North American size. Other squares and plank-style formats are made — check your specific product.

Waste Allowance (%)

Extra tiles for cuts around edges and mistakes.

7% is a typical starting point for a simple rectangular room; irregular layouts or patterned installations may need more.

Carpet tiles needed

116 tiles

High confidence

Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

Carpet tile count = ceil((floor area ÷ tile area) × (1 + waste allowance)), the same coverage method used for ceramic tile, applied to standard square modular carpet tiles (commonly 0.5m × 0.5m)

Inputs used

Floor Area: 430 sq ft
Carpet Tile Size (square): 24 in
Waste Allowance (%): 7

Final result116 tiles

What this calculation does not cover

Orders the exact count and no dye lot. Carpet tile is made in production runs that differ slightly in shade, so the tiles that make one floor should all come from one lot - and the whole point of a modular floor, lifting a ruined tile and dropping in a clean one, needs attic stock held back from that same lot. That is normally a box or two beyond this figure. A tile bought two years later fits perfectly and does not match.
Nothing here looks at the subfloor. The adhesive or tackifier is chosen against the slab's moisture state, and a concrete floor that has not been tested for relative humidity - in-slab probes to ASTM F2170 are the usual method - can push enough moisture through to break the bond and curl tile edges months after handover. Levelling compound to bring a rough or hollow slab into tolerance is a separate bagged quantity on top of the tiles.

Estimated cost — your price

Price per tile ($)

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.

Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.0.1

Regulatory standards & verification citations1

Carpet tile count = ceil((floor area ÷ tile area) × (1 + waste allowance)), the same coverage method used for ceramic tile, applied to standard square modular carpet tiles (commonly 0.5m × 0.5m)

Cite this page

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Tools and safety for this job

To lay carpet. Generic types, no brands, no prices.

Protection this work requires

Boards, blocks and bagged material cause most lasting back injuries on small sites: two people or a lifter for full sheets, and never a bag on one shoulder up a ladder.
Knives cause more site injuries than any power tool: cut away from your body, change blades often, and wear cut-resistant gloves to EN 388 level C for repeated cutting.

Show the 5 tools this job needs

Essential

Carpet trimmer and tucking tool
Knee kicker and carpet stretcher
Tape measure
Utility knife

Recommended

Claw hammer

Also needed as materials: replacement blades.

what each flooring tool is for, and the spec that decides which to buy where one does.

Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

Laying Carpet and Carpet Tileuses this calculator

Broadloom arrives at a fixed width, so seam placement — not room area — drives every carpet and carpet-tile decision on site.

Installing a Raised Access Floor

Stripping Out a Fit-Out at Lease End

How to calculate modular carpet tile layout in 4 steps

Floor AreaThe total floor area to be covered with carpet tiles.

Carpet Tile Size (square)The side length of a single square modular carpet tile.

Waste Allowance (%)Extra tiles for cuts around edges and mistakes.

Carpet tiles neededThe tool computes the carpet tiles needed from those figures and shows the formula, its sources, and a confidence rating alongside it.

Floor Area	Carpet tiles needed (tiles)
200 sq ft	80
300 sq ft	120
400 sq ft	160
500 sq ft	199
600 sq ft	239
700 sq ft	279
800 sq ft	319

Floor Area

Carpet tiles needed (tiles)

200 sq ft

300 sq ft

120

400 sq ft

160

500 sq ft

199

600 sq ft

239

700 sq ft

279

800 sq ft

319

Frequently asked questions

Why use modular carpet tiles instead of broadloom rolls?

Modular carpet tiles allow individual tiles to be replaced if damaged or worn, and they generate less waste in irregular rooms since offcuts from one tile can often be used elsewhere — broadloom rolls are typically more economical for large, simple, open areas.

Does the waste allowance change with the installation pattern?

Yes — a simple monolithic (all tiles facing the same direction) layout typically needs less waste than an ashlar or herringbone pattern, which creates more cut pieces at the room's edges.

What if my tiles aren't square?

This calculator assumes a square tile, and the box asks for one SIDE of it, which the calculation then squares. For a rectangular plank, work out its area first (length x width) and enter the square root of that area — a 1 m by 0.25 m plank is 0.25 m², so enter 0.5. Do not enter the area itself: the box would square it again and return four times the planks you need.