How to use this tile calculator
Measure the surface, enter tile size and choose a waste allowance to estimate the number of tiles to buy.
How the calculation works
Surface area = length × widthTile area = tile length × tile widthRecommended tiles = area ÷ tile area × (1 + waste %)AdvertisementGoogle AdSense placeholder
Example project
A 12 × 15 ft floor using 12 × 24 in tile needs about 90 tiles before waste and about 99 with 10% waste.
Practical tips
- 10% is a common starting allowance.
- Patterns and diagonal layouts need more waste.
- Keep a few matching tiles for repairs.
Frequently asked questions
How much extra tile should I buy?
Ten percent is common for simple layouts; complex cuts may need more.
Does grout spacing matter?
It has a smaller effect than waste for most homeowner estimates.
Can I estimate cost?
Yes, enter a price per tile.