Tile Calculator
Calculate the number of tiles needed for floors, walls, or backsplashes based on area and tile size.
This free online tile calculator provides instant results with no signup required. All calculations run directly in your browser — your data is never sent to a server. Enter your values below and see results update in real time as you type. Perfect for everyday calculations, homework, or professional use.
Minimum: 0
Length of the area to tile
Minimum: 0
Width of the area to tile
Minimum: 0
Length of one tile
Minimum: 0
Width of one tile
Minimum: 0
Width of grout lines (1/8 in typical)
Extra for cuts and breakage
Results
Total Area
100 sq ft
Tiles Needed
108
Boxes (10/box)
11
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Tile Calculator. Most fields include unit selectors so you can work in your preferred unit system — metric or imperial, whichever matches your problem.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors and can produce results that are off by factors of 2, 10, or more.
Read the results
The Tile Calculator instantly computes the output and displays results with units clearly labeled. All calculations happen in your browser — no loading time and no data sent to a server.
Explore parameter sensitivity
Try adjusting individual input values to see how the output changes. This is a quick and effective way to develop intuition about how different parameters influence the result and to identify which inputs have the largest effect.
Formula Reference
Tile Calculator Formula
See calculator inputs for the governing equation
Variables: All variables and their units are labeled in the calculator interface above. Input fields accept values in multiple unit systems — select your preferred unit from the dropdown next to each field.
When to Use This Calculator
- •Use the Tile Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
- •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
- •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
- •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.
About This Calculator
The Tile Calculator is a free, browser-based calculation tool for engineers, students, and technical professionals. Calculate the number of tiles needed for floors, walls, or backsplashes based on area and tile size. It implements standard formulas and supports both metric (SI) and imperial unit systems with automatic unit conversion. All calculations are performed instantly in your browser with no data sent to a server. Use this calculator as a quick reference and sanity-check tool during design, analysis, and learning. Always verify results against primary engineering references and applicable standards for any safety-critical application.
About Tile Calculator
Whether you are tiling a kitchen backsplash, a bathroom floor, or an entire room, accurate tile estimation prevents costly shortages or excessive leftover material. This calculator considers the overall area, tile dimensions, grout line width, and a waste factor for cuts and breakage. Tiles are sold individually or in boxes (typically 10 to 15 per box), and matching dye lots is critical for consistent appearance. Running short mid-project means the replacement tiles may come from a different production batch with slight color variations. Adding a 10 to 15 percent waste factor is standard practice, with higher percentages for diagonal patterns or complex layouts.
The Math Behind It
Formula Reference
Tiles Needed
Tiles = Area / Tile Coverage x (1 + Waste%)
Variables: Tile coverage includes grout joint on each edge.
Worked Examples
Example 1: Bathroom floor 8 x 6 ft with 12x12 tiles
Area = 8 x 6 ft, Tile = 12 x 12 in, Grout = 1/8 in, Waste = 10%
You need approximately 52 tiles (6 boxes of 10).
Common Mistakes & Tips
- !Not accounting for grout lines, which slightly reduces the number of tiles needed per square foot.
- !Using too low a waste factor for diagonal or complex patterns.
- !Forgetting that tiles from different production lots may not match in color.
- !Not ordering enough extra tiles to keep as spares for future repairs.
Related Concepts
Used in These Calculators
Calculators that build on or apply the concepts from this page:
Frequently Asked Questions
How much extra tile should I order?
Order 10% extra for straight layouts, 15% for diagonal patterns, and 20% for herringbone or complex designs. Keep a few spare tiles for future repairs.
What grout width should I use?
Use 1/16 to 1/8 inch for rectified porcelain, 1/8 to 3/16 inch for standard ceramic, and up to 3/8 inch for handmade or rustic tiles.