150 sq ft room, 12" tiles, 10% waste
- Tiles ≈ 165
construction calculator
Tile Calculator
Determine tile counts and total area including waste.
Results
- Tiles needed
- 165.00
- Total area (sq ft)
- 150.00
How to use this calculator
- Enter room length/width and tile length/width.
- Enter a waste percentage for cuts and breakage.
- See total tiles needed and total area.
Inputs explained
- Room length/width
- Floor or wall dimensions in feet.
- Tile length/width
- Tile dimensions in feet (convert inches to feet if needed).
- Waste %
- Extra allowance for cuts, patterns, and breakage (5–15% typical).
How it works
Room area = length × width. Divide by tile area, then multiply by (1 + waste%).
Formula
Tiles = (Room area ÷ Tile area) × (1 + waste%)
When to use it
- Estimating tile purchases for floors, showers, or backsplashes.
- Comparing waste for straight lay vs herringbone/diagonal patterns.
- Budgeting tile counts before ordering boxes.
Tips & cautions
- Increase waste for diagonal or complex patterns (10–15% vs 5–8% for straight lay).
- Convert tile size from inches to feet (e.g., 12 in = 1 ft) before entering.
- Order extra for future repairs—patterns and dye lots change over time.
- Assumes rectangular areas; complex shapes need segmentation or overage.
- Does not subtract openings or fixtures; subtract separately if large.
- Tile box coverage varies; round up to full boxes after getting the count.
Worked examples
Deep dive
This tile calculator divides room area by tile area and adds waste to estimate tile counts. Enter room and tile dimensions plus waste % to size your order before installing.
Use it for floors, showers, or backsplashes. Increase waste for diagonal/herringbone patterns and round up to full boxes for future repairs.
FAQs
- How much waste should I include?
- 5% for simple layouts, 10–15% for diagonals or patterns.
- Should I round up to full boxes?
- Yes. Tile comes in boxes; round up and keep extras for repairs.
- How do I handle a shower niche or doorway?
- Subtract large openings from area if you want a tighter estimate, or keep waste higher to cover them.
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Always confirm on site and order a few extra boxes for future repairs.