Tile calculator
Estimate excludes grout spacing. Patterns and edge cuts can change quantities.
Tile count = ceiling(area ÷ tile area × waste factor)
Formula
Ceiling(surface area ÷ tile area × waste factor)
How the calculation works
Estimate whole tile quantities from area and tile dimensions. Enter each measurement in the unit shown beside the input. The result updates when you change a value; incomplete or unsupported inputs display an explanation.
Worked example
20 m² with 30 cm × 30 cm tiles and 10% allowance needs 245 tiles.
When to use this calculator
Use this to estimate rectangular tile quantities before ordering whole boxes.
Common mistakes and limits
Grout gaps are excluded. Tile orientation, pattern matching, and cuts affect the final count.
Check your result
Check that all measurements describe the same object or time period. Repeat the calculation with unrounded values, then round only the final quantity to a precision suitable for the task.
Frequently asked questions
Does this calculator need an account?
No. Calculations run in your browser without an account.
How precise is the displayed result?
The display rounds to six decimal places. Measurement uncertainty can be larger than this rounding.
