How to use this calculator
Start by entering the length and height of each countertop section where you want a backsplash. If your kitchen has an L shape or U shape, add each straight section separately using the "add section" button. The standard backsplash height is 18 inches, but you can enter any height that matches your layout.
Next, enter the number of electrical outlets, windows, and any range hood cutout in the backsplash area. The calculator deducts these openings from your total tile area so you do not overbuy. Select your tile type and size, then choose a waste factor. A 10% waste factor is standard for straight layouts, while diagonal or herringbone patterns should use 15% or more.
The results show your total backsplash area in square feet, the number of individual tiles or mosaic sheets needed, and a material cost estimate based on the price per tile you enter. Use this information when shopping for tile to ensure you purchase enough material in a single dye lot.
How to measure for a backsplash
Measure each straight section of countertop where the backsplash will go. If your kitchen has an L shape or U shape, enter each section separately. Measure the height from the top of the countertop to the bottom of the upper cabinets (typically 18 inches).
Count your electrical outlets and note any window or range hood that interrupts the backsplash area. These cutouts reduce your tile needs but still require careful cuts, which is why the 10% waste factor remains important.
Frequently asked questions
What is the standard backsplash height?
The standard kitchen backsplash height is 18 inches, measured from the countertop to the bottom of the upper cabinets. Some homeowners choose a 4 inch backsplash for a minimal look or go all the way to the ceiling for a full height backsplash.
How do I handle corners in a backsplash?
Inside corners are straightforward since tiles butt together. Outside corners need a finished edge using bullnose tile, metal edge trim, or a mitered cut. Plan your layout so cut tiles end up in corners where they are less visible.
Subway tile vs mosaic sheets for a backsplash?
Subway tile (3x6 or 4x12) is the most popular backsplash choice because it is affordable, timeless, and easy to install. Mosaic sheets are pre-mounted on mesh and cover large areas quickly but cost more and are harder to cut precisely around outlets.
Do I need trim pieces for my backsplash?
You need trim or edge pieces wherever your tile ends on an exposed edge, such as the top of the backsplash if there are no upper cabinets, at the sides where the backsplash ends, or around a window. Common options are bullnose tile, pencil liner, or metal schluter strips.