Tile Quantities & Full Boxes

When to use it

Before ordering one tile style for a rectangular floor, estimate how many pieces and full boxes the area requires. This page provides the method and a downloadable canvas, not an online tile-layout planner. The example uses metres and millimetres; enter each measurement with its matching compatible unit in the App.

Inputs

Calculation method

Multiply floor length by width, then add the chosen percentage of that net area. Tile length × width carries its units; Calvance converts the resulting area from mm² to m², with no manual division by 1,000,000. Divide the area including allowance by one tile’s area and round up to a whole piece. Divide that piece count by tiles per box and round up again. Here 2.2 × 1.8 = 3.96 m²; adding 8% gives 4.2768 m². A 300 × 300 mm tile covers 0.09 m². Rounding 47.52 up gives 48 pieces; 10 per box means 5 boxes, containing 50 pieces. The two pieces above the 48-piece estimate come from box rounding, not from an extra allowance.

2.2 [Floor length m] × 1.8 [Floor width m] → Floor area m²

Floor area m² × (1 + 8 [Allowance added to floor area]%) → Area including allowance m²

300 [Tile length mm] × 300 [Tile width mm] → Area per tile m²

ceil(Area including allowance m²/Area per tile m²) → Estimated tile pieces

ceil(Estimated tile pieces/10 [Tiles per box]) → Full boxes to buy

Change one input

Change only the box contents from 10 to 8 tiles. All areas and the 48-piece estimate stay the same, but the purchase changes from 5 to 6 full boxes. At 8 per box those 6 boxes contain 48 pieces. A larger box count does not tell you which option costs more.

Results are displayed to at most two decimal places; later formulas use unrounded values.

Scope and limits

• Area estimate for one rectangular floor and one tile size. No layout or cutting plan.
• 8% is an example, not a recommended waste allowance. Use unrounded areas.
• Dimensions > 0; allowance ≥ 0; tiles per box must be a positive integer.

The model does not subtract untiled areas or account for grout joints, cutting reuse, pattern, breakage, adhesive, grout quantity or price. Set the allowance for the actual project and check the manufacturer’s dimensions, pieces per box and stated coverage. Nominal dimensions can differ from usable coverage. This estimate cannot guarantee enough tiles on site.

Download and import into Calvance to edit the numbers. The canvas does not reject every invalid input; check the stated ranges.

Common questions

Why round up twice?

A fractional tile is counted as a whole piece, and a partial box as a whole box. Exactly 50 pieces at 10 per box need 5 boxes; 51 pieces need 6. This does not optimize where cuts are reused.

Is 8% enough for every floor?

No. It is only this example’s allowance relative to net floor area. Select it from the actual layout and installation requirements; do not treat it as a guaranteed loss rate.

What if the carton only lists square metres?

Check its stated coverage with the supplier. For an area-only estimate, divide the area including allowance by coverage per carton and round up. This canvas instead expects a positive whole-number piece count per box; do not enter square metres in that input.

How to import your template

We recommend using the latest version of Calvance.

1. Save the file. Choose Download template and save the .calvx file to Files on your iPhone or iPad. From a computer, you can send it to your device with AirDrop.
2. Open Import. In All Canvases in Calvance, tap the add button to open the template screen, then choose Import.
3. Choose the file. Select the saved .calvx file to create your own canvas. Importing uses one canvas from your allowance.
4. Edit and check. Check the results against the worked example, then add your numbers. Duplicate the canvas to keep different versions.

Download .calvx file