How many tiles do I need for a garage floor?

Divide the garage floor area (width × depth) by the face area of one tile, then add wastage. A 6 m × 6 m garage is 36 m²; with 450 mm tiles (0.2025 m² each) and 10% wastage that is about 196 tiles. Enter your own dimensions above and the calculator rounds up for you.

How many boxes of tiles for a double garage?

For a 6 m × 6 m (36 m²) double garage at 10% wastage, a box covering about 2.02 m² works out to roughly 20 boxes. Always round up to whole boxes and confirm the m²-per-box figure on the supplier label — it varies by tile size and count.

What size are garage floor tiles?

Interlocking PVC garage tiles are usually 300 mm squares. Ceramic and porcelain garage tiles are commonly 450 mm or 600 mm. Set the tile size above — it changes the tile count but not the floor area.

How much wastage should I allow for garage floor tiles?

10% for a straight-lay grid; 15% or more for diagonal or brick-bond patterns, which produce more perimeter offcuts. Large tiles and irregular garage shapes push wastage up.

Do I need to tile under the garage (roller) door?

Yes — the threshold row under the roller door still needs tiles. Measure the garage between the finished walls including that strip so the calculator’s box count covers it.

AreaSum

Free tool

Garage Floor Tile Calculator

Enter garage width, depth, tile size and wastage. The calculator returns tile count, floor area and the number of boxes to order.

Inputs

Garage width

Garage depth

Tile size (square)

Common garage sizes: 300 mm (interlocking PVC), 450 mm and 600 mm (porcelain / ceramic).Box coverage

m²

Read from the supplier's box label. Ceramic 450 mm packs usually cover ~2.02 m² (10 tiles per box).Wastage

10% is safe for a straight-lay grid. Diagonal patterns need 15%+.

Result

Boxes to order20Rounded up, wastage applied.

Floor area36.00 m²

Tile count196

Coverage-with-wastage: 39.60 m². Always cross-check tile count against a scaled floor plan before ordering — cut tiles at the perimeter and the roller-door threshold can shift the count by one box.

How the calculation works

Floor area is width × depth. The calculator applies your wastage percentage first, then divides by the per-tile face area to get the tile count and by the per-box coverage to get boxes needed. Both figures round up to the next whole tile or box so the perimeter cuts and the roller-door threshold row are covered.

Box coverage varies by supplier — a 450 mm ceramic box with 10 tiles is roughly 2.02 m², but always confirm against the label before ordering. A single box in either direction can shift the count on a small garage.

Ordering grout and adhesive as well? Use the tile and grout estimator — same tile size, floor area and wastage inputs, plus outputs for adhesive bags and grout kilograms. Quoting a whole-house fitout with a garage tile section? Mark each room from a PDF plan in AreaSum and the report rolls totals up per material. See how it works.

See also: wastage allowance, flooring takeoff — or the audience guide for tile installers.

Garage floor tiles — frequently asked questions

How many tiles do I need for a garage floor?: Divide the garage floor area (width × depth) by the face area of one tile, then add wastage. A 6 m × 6 m garage is 36 m²; with 450 mm tiles (0.2025 m² each) and 10% wastage that is about 196 tiles. Enter your own dimensions above and the calculator rounds up for you.
How many boxes of tiles for a double garage?: For a 6 m × 6 m (36 m²) double garage at 10% wastage, a box covering about 2.02 m² works out to roughly 20 boxes. Always round up to whole boxes and confirm the m²-per-box figure on the supplier label — it varies by tile size and count.
What size are garage floor tiles?: Interlocking PVC garage tiles are usually 300 mm squares. Ceramic and porcelain garage tiles are commonly 450 mm or 600 mm. Set the tile size above — it changes the tile count but not the floor area.
How much wastage should I allow for garage floor tiles?: 10% for a straight-lay grid; 15% or more for diagonal or brick-bond patterns, which produce more perimeter offcuts. Large tiles and irregular garage shapes push wastage up.
Do I need to tile under the garage (roller) door?: Yes — the threshold row under the roller door still needs tiles. Measure the garage between the finished walls including that strip so the calculator’s box count covers it.

Measure the garage off the plan

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