SettingsSettings for this calculationUS
The standard allowance most suppliers and estimating guides assume for ordinary work.
The length of the area to be tiled.
Measure the floor or wall area's length.
Tools needed: Tape measure
The width of the area to be tiled.
Measure perpendicular to the length.
Tools needed: Tape measure
Larger tiles mean fewer joints and less grout, but more waste per cut.
For rectangular (non-square) tiles, pick the closest equivalent-area size or calculate area coverage manually.
Extra tile for cuts around edges and obstacles.
10% for a straightforward layout, 15% for diagonal patterns, 20%+ for intricate layouts or small rooms with many cuts.
Estimated tile & grout needed
143 tiles
Grout quantity varies significantly with joint width and depth — the grout bag figure is a rough planning number; check your specific grout product's coverage chart before purchasing.
- Area to tile
- 130 sq ft
- Estimated grout bags (rough)
- 2 bags
They open the calculator with your figures already in it
Tile & Grout Calculator: 143 tiles — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
Show calculation logicHide calculation logic
How this was calculated
Formula source(s)
- Tile count = area / tile coverage, with a waste factor for cuts; grout coverage depends on tile size, joint width, and grout depth
- A commonly-cited grout coverage rule of thumb: larger tiles and narrower joints need proportionally less grout per square foot
Inputs used
- Area Length
- 13 ft
- Area Width
- 10 ft
- Tile Size (square)
- 12x12 in
- Waste Factor (%)
- 10
Intermediate steps
- Area to tile
- 130 sq ft
- Estimated grout bags (rough)
- 2 bags
Confidence note: Grout quantity varies significantly with joint width and depth — the grout bag figure is a rough planning number; check your specific grout product's coverage chart before purchasing.
What this calculation does not cover
- The grout line is a flat divide of the floor area by 75 square feet (7 m²) per bag, and it never looks at the tile size you picked further up the form: a 6 inch tile and a 24 inch tile laid over the same room come back with the same bag count, even though the small format has roughly four times as much joint running through it. That 75 sits in the middle of a 50 to 100 square feet (4.6 to 9.3 m²) spread for a 25 lb (11 kg) bag, so a dense small-format layout that genuinely gets 50 square feet out of a bag needs half again as many bags as the breakdown shows.
- Tile count divides the floor by the nominal face area — a 12 by 12 in tile is treated as exactly one square foot — with nothing taken out for the joints between them, so the grid is costed as though the tiles butt edge to edge. The quiet surplus that leaves grows as the tile shrinks: on a 1/4 in joint a 6 in tile occupies about eight per cent more floor than it is credited with, while a 24 in tile on a 1/8 in joint is out by barely one.
- Four square formats are offered and each market's own sizes are used behind them — 150, 300, 450 and 600 mm on metric, 6, 12, 18 and 24 in on imperial — so the two sides of the toggle return different counts for the same floor, correctly, because they are different tiles. Planks, mosaic sheets, hexagons and any rectangular format have no representation at all; substituting the nearest equal-area square gets the square footage right but not the cut pattern or the joint length.
- Area comes from one length multiplied by one width, so an island, a hearth, a cabinet run, a door recess, an L-shaped room or a second wall each have to be run separately and added up by hand. Walls and floors also pass through identical arithmetic here, with nothing counted for bullnose, cove base, trim pieces or the edge profiles a tiled wall normally needs, and nothing for thinset, backer board, membrane, spacers or sealer.
- Waste is applied as a flat percentage of the whole area rather than anything derived from the perimeter or the shape of the room, so a long narrow bathroom with cut tiles down both sides and a square room of the same size receive the same allowance while the narrow one consumes more. The answer is then rounded up to a whole tile and not to a whole box, so a merchant selling in boxes of ten or fifteen rounds the real order up a second time, and nothing is held back as spare stock for a later repair in the same shade batch.
Estimated cost — your price
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.
Part of bigger jobs
This trade is one line of several job takeoffs. Run the whole job and every other trade comes back with it, off the same measurements.
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 2026-09-17 · v1.0.2
Regulatory standards & verification citations2
- Tile count = area / tile coverage, with a waste factor for cuts; grout coverage depends on tile size, joint width, and grout depth
- A commonly-cited grout coverage rule of thumb: larger tiles and narrower joints need proportionally less grout per square foot
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 floor tile, tile a wall, cut ceramic and porcelain tile, grout and seal tiling and mix adhesive or mortar. Generic types, no brands, no prices.
Protection this work requires
- Cutting or grinding concrete, masonry, screed, tile or fibre-cement board releases respirable silica: cut wet or extract at the tool, and wear a P2/N95 respirator at minimum — a nuisance dust mask does not filter it.
- Wet cement and lime burn skin and eyes painlessly until the damage is done: waterproof gloves to EN 374, safety glasses whenever the mix can splash, and never kneel in wet mix in permeable trousers.
- Saws, grinders and breakers run above 85 dB, where hearing damage accumulates and does not recover: defenders or plugs for every cut, not just the long ones.
- 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.
Show the 15 tools this job needsHide tools
Essential
Chalk line
Grout float and sponge
Manual tile cutter
Mixing bucket or tub
Notched trowel
Paddle mixer
Spirit level
Tape measure
Recommended
Caulking gun
Rubber mallet
Tile nippers
Wet tile saw
Optional
Hole saw set
Laser level
Shovel and spade
Also needed as materials: caulk and sealant cartridges, chalk refill, diamond tile blades, grout sponges.
what each tiling tool is for, and the spec that decides which to buy where one does.