Backsplash Calculator
Figure out how many tiles you need for your kitchen backsplash. Supports multiple wall sections and includes material estimates.
Last updated: January 7, 2026
Enter Your Measurements
Wall Sections(for L-shaped kitchens)
Quick:
Include materials estimate (thinset, grout)
Enable cost estimate
Results
132
tiles needed
Total Area:15 sq ft
Base Tiles:120 tiles
Extra for Waste:+12 tiles
Boxes Needed:~7 boxes (20/box)
Materials Estimate
Thinset:~11 lbs
Grout:~7 lbs
Calculation Steps
Total Area: Sum of all wall sections= 15 sq ft
Tile Area: 3" × 6"= 0.125 sq ft per tile
Base Tiles: 15 sq ft ÷ 0.125 sq ft= 120 tiles
+ 10% Waste: 120 × 1.1= 132 tiles
Privacy First - All calculations in your browser Industry-standard formulas
How to Use This Calculator
- Choose your backsplash height — 18 inches (countertop to cabinets) is the most common. Go taller behind the stove for extra protection.
- Measure your wall sections — Measure the width of each backsplash area in inches. Don't forget behind the stove if you want it taller there.
- Add multiple sections — Click "Add Section" for L-shaped kitchens or areas with different heights. Toggle sections on/off as needed.
- Pick your tile size — Classic 3×6 subway tiles? Always a safe bet. Larger tiles mean fewer grout lines but more cutting.
- Check your results — The calculator shows tiles needed plus material estimates. Copy the results to take to the store.
How We Calculate
Tiles Needed = (Total Wall Area ÷ Tile Area) × (1 + Waste%)
Example Calculation:
- • Main wall: 120" × 18" = 2,160 sq in = 15 sq ft
- • Tile: 3" × 6" = 18 sq in = 0.125 sq ft per tile
- • Base tiles: 15 ÷ 0.125 = 120 tiles
- • With 10% waste: 120 × 1.1 = 132 tiles
Waste percentage and installation best practices per TCNA Handbook. Learn more →