Tile & Flooring Calculator Skip to main content
Residential Free Pro Features Available

Tile & Flooring Calculator

Calculate tile quantity, thinset coverage, and grout volume for any floor or wall layout, including waste factors for diagonal and herringbone patterns.

Field guide: Tile Estimating: Pattern Waste, Grout, and Thinset

PREVIEW All Pro features are currently free for a limited time. No license key required.

Residential
Pop Out

Tile install kit

Tile setting and layout products selected from floor and wall takeoffs:

As an Amazon Associate, ToolGrit earns from qualifying purchases, at no extra cost to you. These are hand-picked suggestions; calculator results are not influenced by them.

Enter room dimensions and tile size to get a planning count of tiles, boxes, thinset bags, and grout quantity. The calculator applies local planning waste rows by layout pattern and keeps TCNA, ANSI A108, manufacturer TDS, substrate, waterproofing, and installer-review gaps visible.

Pro Tip: Always dry-lay your first two rows before mixing thinset. This lets you check that the layout is centered and that you will not end up with a narrow sliver of tile along the most visible wall. A sliver less than half a tile width looks like a mistake.

Estimate drywall or cement board for the substrate

Drywall Estimator →

Calculate grout and thinset quantities separately

Grout & Thinset Calculator →

Comparing tile against hardwood or laminate costs?

Flooring Material Calculator →

Calculate stair dimensions where flooring transitions levels

Stair Stringer Calculator →

How It Works

  1. Enter Room Dimensions

    Input the floor area length and width, or wall height and width for backsplashes and shower walls. For L-shaped rooms, enter each section separately.

  2. Specify Tile Size

    Enter the tile dimensions (e.g., 12x24, 6x6, 3x12 subway). The calculator uses these to determine tiles per square foot and a local trowel planning row to verify against the mortar TDS.

  3. Choose Layout Pattern

    Select straight lay (10% planning waste), 1/3 offset or brick pattern (12%), diagonal (15%), herringbone (17%), chevron (19%), basketweave (12%), or enter a custom percentage. These are planning allowances, not standard values - pattern choice directly affects how many tiles you need to buy.

  4. Set Grout Joint Width

    Enter the grout joint width in fractions of an inch (1/16, 1/8, 3/16, 1/4). Wider joints require more grout but are more forgiving of slight tile size variations.

  5. Review Material List

    The results show total tiles (rounded up to full boxes), bags of thinset, grout quantity, and a trowel planning row. Each quantity includes the pattern-specific planning waste factor.

Built For

  • Homeowners retiling a bathroom floor who need an early box-count prompt before supplier and installer review.
  • Contractors preparing preliminary material lists for kitchen backsplash installations with subway tile in a herringbone pattern.
  • Flooring installers screening thinset and grout quantities for large-format porcelain tile before checking product data.
  • DIYers comparing material cost between different tile sizes and patterns before committing to a design.

Assumptions

  • Thinset coverage uses local 50-lb bag planning rows selected by tile size, not a product-specific TDS.
  • Waste percentages are local planning allowances for rectangular-layout screening, not standards-table values.
  • Grout calculations assume consistent joint width, tile thickness, and disclosed 100/90 lb per cubic foot grout densities.
  • Shower mode is a simplified geometric prompt and not a waterproofing-system design.

Limitations

  • Does not calculate substrate prep, deflection, lippage controls, movement joints, membrane overlaps, mortar-bed build-up, or code/AHJ acceptance.
  • Does not calculate additional thinset needed for leveling uneven substrates. Floors out of plane should be evaluated before tiling.
  • Mosaic sheets and natural stone with irregular edges may require waste factors higher than listed.

References

  1. TCNA Handbook 2025 source pointer for method/substrate/wet-area context; protected method tables are not reproduced.
  2. ANSI A108/A118/A136.1 source pointer for installation/material context and field coverage checks.
  3. NIST SP 811 source pointer for unit conversions.

Frequently Asked Questions

The app uses local planning rows: straight lay 10%, 1/3 offset and brick 12%, diagonal 15%, herringbone 17%, chevron 19%, and basketweave 12%. These are not TCNA or ANSI table values. Room shape, layout start, tile size, cutouts, breakage, dye lot, and installer takeoff control the real order quantity.
As a planning starting point, this calculator uses 1/4" x 1/4" square notch up to 8" tile, 1/4" x 3/8" up to 15", and 1/2" x 1/2" for larger formats. The mortar manufacturer TDS for your specific thinset and substrate governs the final trowel choice, and ANSI A108 coverage (about 80% in dry areas, 95% in wet areas, checked by lifting tiles in the field) is the real acceptance test, not the notch size.
The app uses local 50-lb bag planning rows of 95, 70, or 40 sq ft depending on tile size. The selected mortar manufacturer technical data sheet, substrate, back-buttering, and ANSI A108 field coverage checks govern the real quantity.
Grout volume depends on tile size, joint width, and tile thickness. Smaller tiles with wider joints use more grout per square foot because there is more joint area. For example, 3x6 subway tile with 1/8" joints uses about 3 lbs of grout per 10 sq ft, while 12x24 tile with 1/16" joints uses less than 1 lb per 10 sq ft.
Ask the supplier and installer. Tile dye lots vary between production runs, repairs may need attic stock, and the final allowance depends on layout, breakage, returns, supplier box rounding, and future-service expectations.
Yes, as a quantity screen. Enter wall height and width, or direct square footage. Shower mode is a simplified 8-ft, three-wall prompt with optional ceiling and 2 sq ft per niche; it is not a waterproofing or TCNA method design.
The app suggests sanded at 1/8" joints and wider, unsanded below 1/8". Verify the actual grout product, tile surface, glass/stone scratch risk, movement joints, and manufacturer instructions before use.
Disclaimer: Use these outputs as planning prompts only. Verify actual measurements, layout, product technical data sheets, TCNA method, ANSI A108 field coverage, substrate, movement joints, waterproofing, supplier rounding, dye lot, and installer takeoff before purchase or installation.

Guides for this job

Residential

Tile Estimating: Pattern Waste, Grout, and Thinset

How pattern layout affects waste, trowel size selection, grout joint width material impact, and material lists for tile projects.

Read Guide →

More Residential tools

Residential Live

Paint Coverage Calculator

Calculate gallons of primer and topcoat needed for any room or project. Surface-aware coverage rates, color change logic, multi-room batch mode, and spray waste factors.

Launch Tool →
Residential Live

Drywall Estimator

Calculate drywall sheets, joint compound, tape, screws, and corner bead. Counts sheets per wall section (not per square foot), with fire rating, multi-room batch, and cut optimization.

Launch Tool →
Residential Live

Fence Material Takeoff Estimator

Calculate posts, rails, pickets, concrete, and hardware for wood privacy, shadowbox, split rail, chain link, vinyl, and metal panel fences. Frost line depth integration and gate sizing.

Launch Tool →