How to use this calculator
Estimate tiles for a rectangular area. Enter area to cover (sq ft), tile length (inches), tile width (inches), extra tiles (%). The result updates when you change an input. To compare two sets of inputs, save scenario A, then enter the second set; the result panel shows the difference.
Formula and limits
Tiles = ceiling[area × 144 ÷ (tile length × width) × (1+waste/100)]. Does not account for grout gaps or layout patterns.
Worked example
The following example uses the calculator’s starting values. It is an illustration of the method, not a recommended target.
| Input | Example value |
|---|---|
| Area to cover (sq ft) | 120 |
| Tile length (inches) | 12 |
| Tile width (inches) | 12 |
| Extra tiles (%) | 10 |
Whole tiles including allowance: 132
Interpreting your result
Confirm actual dimensions, supplier specifications, and site conditions. Quantity estimates do not establish structural adequacy or compliance with building codes. Waste allowances are user assumptions.
Comparing alternatives
Save the first result as scenario A, then change one input. The comparison shows the numeric difference; it does not label either result as better. Choose inputs that describe realistic alternatives. Values shown on screen are rounded, so calculations from rounded intermediate results may differ slightly.