Kitchen Backsplash Calculator — Free Online Tool
The backsplash is the smallest tiled area in the house — and the most visible. This kitchen backsplash calculator turns your wall measurements into an exact tile count for standard 4×4 tiles, with cutting waste included.
What is the Kitchen Backsplash Calculator?
Measure the total horizontal length of countertop the backsplash will cover and the height (standard is 18 inches from counter to upper cabinets; full-height goes to the ceiling). A 4×4 tile covers 1/9 square foot, so the raw count is area × 9 — then waste goes on top.
The 15% waste factor covers outlet cutouts (kitchens have many), edge cuts, and pattern alignment. Subway tile layouts need slightly more than square grids due to the half-tile offsets. This kitchen backsplash calculator assumes 4×4 tiles — for subway or mosaic, use the square-footage figure it gives you and convert with your tile's coverage.
How to use this calculator
- Measure the length of counter the backsplash covers (inches).
- Measure the height (18" standard, or to the ceiling).
- Enter both and click Calculate Backsplash.
- Mark outlet locations before you start tiling.
Formula
Frequently asked questions
What is the standard backsplash height?
18 inches from countertop to upper cabinets — or full height to the ceiling for a modern look. This kitchen backsplash calculator accepts any height.
How do I tile around outlets?
Turn off power, remove cover plates, and cut tiles to fit around the boxes with a wet saw or nipper — the plate covers small gaps.
Does subway tile need more waste?
Yes — the running-bond offset creates more cuts. Plan 15–20% waste for subway patterns.
Should I tile behind the stove?
Yes — slide the range out and tile the full wall. Future appliance swaps will thank you.