Measuring a hexagon tile accurately is the foundational step to ensuring a successful installation, whether you are creating a geometric floor pattern, a bathroom feature wall, or a custom tabletop. While the process might seem intimidating due to the non-standard shape, it breaks down into simple, logical steps that rely on basic geometry. The key is to distinguish between measuring for purchase—where you need the physical dimensions of the tile—and measuring for installation, where you calculate the space and the grout lines. This guide will walk you through the methodology, providing clear definitions and practical formulas to get professional results.
Understanding Hexagon Terminology
Before grabbing a tape measure, it is essential to understand the specific geometry of the tile. A regular hexagon has six equal sides and six equal angles. When professionals discuss size, they are almost always referring to the "across flats" measurement, which is the distance between two parallel sides. This is distinct from the "across corners" measurement, which is the distance between two opposite vertices (points). Confusing these two measurements is the most common mistake made by DIY enthusiasts. To visualize the "across flats" dimension, imagine the hexagon sitting flat on a table; the "across corners" dimension would be a vertical line drawn through the center.
Tools You Will Need
- Tape measure (preferably a metal one for accuracy)
- Calculator
- Pencil and paper
- Straight edge or ruler
- Angle calculator (optional, for grout angles)
How to Measure for Standard Across Flats Dimensions
If you are standing in a store or looking at a catalog, the size of the hexagon is typically defined by the "across flats" dimension. To measure this yourself, place the hexagon tile flat on a stable surface. Extend your tape measure across the shape, ensuring the edge is parallel to two opposite sides. Do not measure from point to point, as this will give you the wrong number and result in ordering the incorrect tile. This measurement determines the overall footprint the tile will take up on your substrate.
Calculating the Area and Layout
Once you have the dimension of the side (let us call it "S"), you can calculate the area to understand how much material you need. The formula for the area of a regular hexagon is: Area = (3√3 / 2) * S². However, a more practical approach for layout is to treat the hexagon as a rectangle for spacing purposes. To find the width of that rectangle, multiply the side length (S) by 2. To find the height of the rectangle, multiply the side length by the square root of 3 (approximately 1.732). This "bounding box" method helps you visualize the grid and calculate the grout lines required to center the tile within your space.
| Measurement Type | Description | Formula |
|---|---|---|
| Across Flats (S) | Distance between two parallel sides | Measured directly with tape |
| Across Corners (D) | Distance between two opposite vertices | D ≈ 1.154 × S |
| Height (H) | Total vertical space tile occupies | H ≈ 1.732 × S |
| Width (W) | Total horizontal space tile occupies | W = 2 × S |
Accounting for Grout Lines
Professional results account for the grout that holds the tile in place. Never assume the space between tiles will be zero. A standard grout joint is 1/8 inch, but this can vary based on the size of the tile and personal preference for a tighter or wider gap. When measuring your installation area, subtract the total grout width from the available space to determine how many tiles will fit. For example, if your wall is 36 inches wide and you plan for 1/8-inch grout lines, you effectively have 35.75 inches of usable space to cover with tile and grout combinations.
Special Considerations for Angled Cuts
Hexagon tiles often require 60-degree cuts at the edges of the installation. To determine the angle for your cuts, you need to measure the edge where the tile will meet a perpendicular border. The standard internal angle of a hexagon is 120 degrees, meaning the cut angle for the saw is 60 degrees (the complement to 90 degrees). If you are creating a "flower" pattern with a central tile surrounded by others, you must measure the specific gap where the cut tile will fill the space, rather than relying on a standard dimension. This ensures the pattern flows seamlessly without awkward slivers.
