Tile · US units

Tile Calculator — Tiles and Thinset Bags

Each tile occupies ((length + grout) / 12) × ((width + grout) / 12) square feet. Mortar coverage is the current Custom VersaBond TDS (product-pdf id=1389), buying the low end of each band — 90 sq ft for 1/4″ square, 60 sq ft for 1/4×3/8. Over 15 in on the long side, this tool switches to MAPEI LFT at 38–45 (buy 38) and leaves mortar dollars null.

Basket 2026-08-27

Floor and tile

Buy this month

106 tiles

2 bags · 1.042 sf each · 110 sf with waste

$23.96

Floor: 100 sq ft
Exact tiles: 105.556
VersaBond bags: 2 (60–67, buy 60)
Mortar $: $23.96

Current TDS-119 id=1389 is 90–100 / 60–67 / 42–47. The 3/4″ U-notch is two rows (34–38 @45° and 42–47 @30°), not one number. Oct 2021 sheet still said 85–95 for 1/4″.

What calculator.net does not show

Geometry sites divide floor area by the tile face and call it done. They also still quote the October 2021 VersaBond sheet: 85–95 sq ft at 1/4″ square and 60–67 at 1/4×3/8, with tile-size notes (<8 in / 8–15 in). The current document at product-pdf?id=1389 is 90–100 / 60–67 / 42–47. Published Date on that file is August 27, 2021. The 3/4″ × 9/16″ × 3/8″ U-notch is two rows, not one number: 34–38 sq ft at 45° and 42–47 sq ft at 30°. This calculator does not collapse them.

VersaBond $11.98 is the 50 lb HD SKU on 2026-08-27. It is applied only on the VersaBond trowel path. Large-format tile wants an LFT mortar; we will not pretend the VersaBond bag is that product.

Worked US example: 10×10 floor, 12×12 tile

1/4 in grout, 10% convention, 1/4×3/8 trowel (8–15 in default), VersaBond $11.98.

tileAreaSf = ((12 + 0.25) / 12) × ((12 + 0.25) / 12) = 1.0425 sf
Floor         = 10 × 10 = 100 sq ft
With 10%      = 110 sq ft
Tiles         = 110 ÷ 1.0425 = 105.51 → buy 106
Bags @ 60 sf  = 110 ÷ 60 = 1.833 → buy 2
Cost          = 2 × $11.98 = $23.96
(tile $ stays null)

Unit check: 12×24 tile on 110 sq ft, 1/4 in grout, 0% waste → 54 tiles. Longest side 24 in is an LFT path; mortar $ stays null.

Citations

Custom Building Products. VersaBond Professional Tile Mortar technical data (product-pdf id=1389). Accessed 2026-08-27. https://www.custombuildingproducts.com/product-pdf?id=1389 — Current TDS-119 coverage chart: 1/4″ square-notch 90–100 sq ft; 1/4×3/8 square-notch 60–67; 1/2″ square-notch 42–47. The 3/4″ × 9/16″ × 3/8″ U-notch is TWO rows: 34–38 sq ft at 45° and 42–47 sq ft at 30°. Published Date August 27, 2021. This site buys the low end (90 and 60). Do not collapse the U-notch rows into one number.
Custom Building Products. VersaBond Professional Thin-Set Mortar TDS-119 (October 2021 sheet). Accessed 2021-10-28. https://www.custombuildingproducts.com/wp-content/uploads/2021/10/TDS-119.pdf — Older sheet still circulating: longest side < 8 in use 1/4″ square-notch at 85–95 sq ft; 8–15 in use 1/4×3/8 at 60–67. The current id=1389 chart is 90–100 / 60–67 / 42–47. This calculator uses the current chart and cites the 2021-10-28 sheet so the 85–95 number is not silently reused.
MAPEI. Ultraflex LFT large-and-heavy-tile mortar product data. Accessed 2026-08-27. https://www.mapei.com/us/en-us/products-and-solutions/products/detail/ultraflex-lft — When the longest tile side is over 15 in, VersaBond is the wrong product class. This tool’s LFT button buys at 38 sq ft/bag on a 38–45 planning band and leaves mortar dollars null. MAPEI Ultraflex LFT published trowel rows include 40–50 (1/2 in square) and 35–40 (3/4 in U-notch); confirm the bag in your hand.

These calculators estimate material takeoff for planning. They are not engineering, structural, or code advice. Confirm spans, mixes, fastener schedules, and permits with a licensed professional and the manufacturer’s current data sheet. Local shelf prices and tax are not this index.