Quick answer
Measure every backsplash run as width × height. Convert inches to feet, add the runs, subtract only large untiled areas, then add an allowance for cuts, outlets, corners and pattern matching.
Step by step
- Map the runs Record sink wall, range wall and short returns separately.
- Convert dimensions 18 inches equals 1.5 feet.
- Calculate net area Multiply each run width by height and add them.
- Round the order Apply waste, then divide by actual box coverage and round up.
Formula or rule of thumb
boxes = ceil((net backsplash area × waste factor) ÷ box coverage)
Example
A 16 ft run at 18 in high is 16 × 1.5 = 24 ft² before waste.
Common mistakes
Subtracting every outlet opening, forgetting side returns, and using floor-tile box coverage for a different backsplash product.
Planning note: product yields, installation methods, site conditions and local requirements can change the final quantity. Use the exact manufacturer or supplier information before purchasing.
FAQ
Should outlets be subtracted?
Usually small outlets are left in because they create cuts and breakage.
Does a herringbone pattern need more?
Often yes because of additional angled cuts.
Should the range wall be measured separately?
Yes, especially when the height or material changes.