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Tile Square Footage Estimator Verified Engineering Math Updated 2026 Standards

Square Footage Calculator for Tile — Floors, Backsplashes & Walls

Calculate exact square footage and individual tile counts for bathroom floors, kitchen backsplashes, and shower walls.

Planning a ceramic or porcelain tile installation in a bathroom, kitchen, or walk-in shower? Measuring wall height and floor dimensions accurately in feet and inches is essential for estimating individual tile counts, carton boxes, and thinset mortar bags. Because edge cuts and corner trimming produce unavoidable waste, calculating precise surface square footage with proper pattern margins ensures seamless grouting without mid-project store runs.

Project Inputs & Specs

Real-time instant calculation
Interactive
Measurement Units
ft
Feet (ft)
in
Inches (in)

Floor length or wall run

ft
Feet (ft)
in
Inches (in)

Floor width or wall height

Coverage per single tile piece
+10%
5% (Grid)10% (Standard)15% (Herringbone)

Visual Blueprint & Diagram

Material representation & depth layering
114.0 Sq Ft= 126 Tiles Required
Tile Estimate
Total Tiles Required
126Tiles / Pieces

Covers 125.4 gross sq ft (~11 cartons at 12 sq ft/box) for 114.0 net sq ft

Net Tiling Area
114.0sq ft
Exact surface measurement
Area with Waste
125.4sq ft
+10% cutting waste
Estimated Boxes
11boxes
~12 sq ft per carton
Thinset Mortar
350lb bags
~45 sq ft per 50lb bag
Need exact box counts and grout weight? Use the Tile Calculator or calculate floor planks with the Flooring Calculator.
Advanced Tiling Pro Engine

Calculate grout width, mortar & tile patterns

Tiling a complex bathroom layout or custom shower niche? Use our full Tile Calculator to compute grout line widths, sanded vs unsanded grout lbs, and mortar notch trowel sizes:

Launch Dedicated Tile Calculator →
← Return to Master Square Footage Calculator (Triangles, Circles & Trapezoids)

Tile Square Footage & Piece Equations

Official mathematical formulas & methodology

Surface square footage is calculated in feet and inches, adjusted for pattern cut waste, and divided by individual tile surface area:

Surface Area = Length (ft) × Width/Height (ft) | Gross Area = Net Area × (1 + Waste%) | Total Tiles = ⌈Gross Area ÷ Tile Sq Ft⌉

Step-by-Step Calculation Rule:

  1. 1Measure the length and width (or height for walls) in feet and inches.
  2. 2Select your target tile dimension (e.g. 12″×12″, 12″×24″, or 3″×6″ subway).
  3. 3Adjust pattern waste margin (10% standard, 15% for diagonal or herringbone).
  4. 4Review tile counts and click below for grout bag and mortar bed calculations.

How to Calculate Square Footage for Tile (Worked Example)

Suppose you are tiling a kitchen backsplash measuring 12 feet long by 9 feet 6 inches tall.

1. Convert 6 inches: 6 ÷ 12 = 0.5 ft → Height = 9.5 ft.
2. Net Surface Area: 12 ft × 9.5 ft = 114.0 Square Feet.
3. Add 10% cutting waste: 114 × 1.10 = 125.4 Gross Sq Ft.
4. For 12″×12″ tiles (1.0 sq ft): 125.4 ÷ 1.0 = 126 Tiles Required.

Frequently Asked Questions

Verified answers from landscaping & construction pros
To calculate tile square footage, measure the length and width (or height for walls) of the surface area in feet and inches. Convert inches to decimal feet (divide by 12) and multiply: Area (sq ft) = Length (ft) × Width/Height (ft). For a bathroom floor measuring 10 ft by 8 ft 6 in (8.5 ft), your net square footage is 85 sq ft.
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