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
Result
Coverage-with-wastage: 39.60 m². Tiles are counted along each wall rather than by dividing area, so the part-tile at the end of a run and at the roller-door threshold is already in the count.
Order all 22 boxes from a single batch — same shade and calibre — and keep spares. Reordering from a different batch risks visible shade or size mismatch.
Got your number? Do the whole job off the plan.
Try it on a real floor plan →How the calculation works
Floor area is width × depth. The tile count is then taken on the grid: whole tiles along each wall, including the grout joint if you set one, with the part-tile at the end of a run counted as a whole tile. Wastage is applied to that count, and boxes are worked out in tiles rather than in square metres.
Box coverage varies by supplier. A 450 mm ceramic box with 10 tiles covers 2.025 m², but always confirm against the label before ordering. Because boxes are counted in whole tiles, a rounded figure here can cost you a box on a small garage.
Updated methodology
This calculator used to divide the area-with-wastage by the face area of one tile, and divide it again by the coverage of one box. Both have changed. Tiles are now counted along each wall, and boxes are counted in tiles, which is how the tile takeoff in AreaSum itself has always worked. A garage is a single rectangle where offcuts have nowhere to go, so dividing area under-ordered it. If you have ordered off this page before, expect the tile and box counts to be higher.
Ordering grout and adhesive as well? Use the tile and grout estimator. It takes the same floor area and tile size, plus the lay pattern, grout joint, trowel notch and box size, and returns adhesive and grout in whole bags. 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: tile wastage by pattern, box coverage, dye lot, batch and calibre, or the audience guide for tilers and tile retailers.
Garage floor tiles — frequently asked questions
- How many tiles do I need for a garage floor?
- Count whole tiles along each wall rather than dividing the area, because a tile cut to fill the end of a run is still a tile you buy. A 6 m × 6 m garage in 450 mm tiles takes 14 tiles along each wall, so 196 before wastage and about 216 at 10%. 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 double garage in 450 mm tiles at 10% wastage, that is about 216 tiles, and a 10-tile box makes 22 boxes. Boxes are counted in whole tiles rather than by dividing area, so confirm the tiles-per-box figure on the supplier label before you order.
- 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?
- Use 10% for a straight-lay grid, 12% for a brick bond, 15% for a diagonal and 20% for herringbone. Add about 2% where the tile has a side of 600 mm or more. Irregular garage shapes and a lot of perimeter cutting push it up again.
- 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
Try AreaSum with a sample plan or upload your own. No signup until you export.