Tile Calculator
Find how many tiles and boxes you need for a floor or wall, with waste.
Enter your values to see the result.
Processing and privacy
Processing varies by tool. Check the instructions for local processing, server requests, external services and any file or request limits before entering sensitive information.
Read the privacy policyHow this calculation works
Understand the method, inputs and limits behind your result.
- Formula
- Tiles = round up [floor area / ((tile width + grout gap) × (tile length + grout gap)) × (1 + waste/100)]. Boxes = round up tiles / tiles per box.
- Variables
- Units: Feet & inches, Meters & cm
- Room length (ft / m)
- Room width (ft / m)
- Tile width (in / cm)
- Tile length (in / cm)
- Grout gap
- Tiles per box
- Extra for waste
- Price per ft² / m² (optional)
- Units
- Grout gap: mm
- Extra for waste: %
- Use the same selected currency for all monetary inputs. Changing the symbol does not convert exchange rates.
- Example
- A 12 × 10 ft kitchen with 12 × 24 in tiles needs about 67 tiles, or 9 boxes of 8, including 10% waste.
- Assumptions
- The result follows the selected options and supplied inputs. Displayed values may be rounded; check input precision before using the result.
- Source
- ToolzHive calculation guide and calculator implementation. External reference verification is pending.
- Last reviewed
- Review date not yet recorded.
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Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Tile Calculator
Find how many tiles and boxes you need for a floor or wall, with waste.
- 1 Enter the room length and width.
- 2 Enter the tile size, grout gap and tiles per box.
- 3 Add waste and read the tiles and boxes needed.
Example and practical tips
A 12 × 10 ft kitchen with 12 × 24 in tiles needs about 67 tiles, or 9 boxes of 8, including 10% waste.
Frequently asked questions
How much extra tile should I buy?
10% for straight layouts and 15% for diagonal or herringbone, plus a box to keep for repairs.
Does grout width matter?
Slightly. Wider joints mean fewer tiles, and the calculator includes the gap.
Practical guides
-
How to Calculate Square Footage of a Room
Calculate floor area from room dimensions, split irregular rooms into rectangles and keep material allowances separate from measured square footage.
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How to Use Tile Calculator
Find how many tiles and boxes you need for a floor or wall from the room size, tile size and grout gap, with waste for cuts and total cost.
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