Construction calculator
Tile Calculator
Estimate tiles needed for floor or wall coverage.
About the tile calculator
The tile calculator estimates how many tiles you need for a floor or wall, based on tile size and waste allowance.
How to use this calculator
- 1
Measure area
Calculate total area to cover in square feet.
- 2
Enter tile dimensions
Enter tile length and width in inches.
- 3
Add waste
Add 10% for standard layouts, 15% for diagonal patterns.
How the calculation works
Tile area = length × width ÷ 144 (sq ft). Tiles needed = total area ÷ tile area, then add waste percentage.
Example: 100 sq ft with 12×12 tiles and 10% waste needs 110 tiles.
Why use construction calculators?
Construction projects involve significant material costs. Overestimating wastes money; underestimating causes delays. These calculators use standard industry formulas to give you reliable estimates for concrete, lumber, drywall, paint, roofing, flooring, and more. Always add 5–15% waste allowance for cuts, mistakes, and irregularities.
How to get accurate results
Measure twice, calculate once. Use a tape measure for dimensions, and enter values in the units shown. For irregular shapes, break the area into rectangles and calculate each separately. When in doubt, round up — it's better to have a little extra material than to run short mid-project.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, market conditions, or individual circumstances. Results are for planning purposes only — consult a qualified professional for regulated, medical, financial, or construction decisions.
Frequently asked questions about tile calculator
How accurate is the tile calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.