Tile Calculator — How Many Tiles, Boxes and Adhesive Bags Do You Need?
Tiles are sold by the box, laid by the piece, and stuck down with adhesive bought by the bag — three different units for one job, which is exactly why tile estimates go wrong. Order too few and the next batch arrives in a different shade; order too many and boxes gather dust in the store. This tile calculator does the full working: enter your room dimensions and tile size, and it returns the tiles required, boxes to order, total area, and adhesive bags (20 kg) — with wastage for cuts and breakage already included.
Calculate exactly how many tiles, boxes, and adhesive cement bags you need for any floor or wall. Enter your area dimensions below for an instant estimate.
🏗 Tile Calculator
Floor & wall tiles — tiles, boxes & adhesive
📋 Calculation Details
Includes 10% wastage for cuts and breakage. Verify with your site engineer.
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Frequently Asked Questions
How many tiles do I need for a 12×10 ft room?
For 120 sq ft with 12×12 inch tiles (1 sq ft each) and 10% wastage, you need 132 tiles, which is 33 boxes (4 tiles per box).
What is the standard tile size in Pakistan?
Common sizes are 12×12 inch (30×30 cm), 24×24 inch (60×60 cm) for floors, and 12×24 inch for walls. The calculator supports all standard sizes.
How much wastage should I add for tiles?
Add 10% for simple rectangular rooms, 15% for rooms with many corners or diagonal laying. The calculator defaults to 10%.
What is tile adhesive and how much do I need?
Tile adhesive (cement-based) is used to fix tiles. Approximately 1 bag (20 kg) covers 100 sq ft. The calculator estimates bags based on your area.
How do I enter 12 feet 6 inches?
Select “Imperial” unit, then enter 12 in Length (ft) and 6 in Length (inch). The calculator combines them automatically.
What does “Tiles per Box” mean?
Tiles are sold in boxes. Enter how many tiles come in one box (usually 4 for 24×24, 6-8 for smaller tiles) to calculate how many boxes to order.
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How to Use This Tile Calculator
Enter the length and width of the area, pick your unit (feet/inch or meter/cm), choose the tile size, set wastage % and tiles per box, then click Calculate Tiles. The calculator shows tiles required, boxes, total area and adhesive bags, plus full calculation details you can download as a picture or PDF.
Tile Calculator Formula
The tile calculator uses a straightforward area method:
- Area = Length × Width (converted to square feet)
- Tile area = (tile length × tile width) ÷ 144 (a 12×12 in tile = 1 sq ft)
- Tiles = Area ÷ Tile area × (1 + wastage %), rounded up
- Boxes = Tiles ÷ tiles per box, rounded up
- Adhesive bags = Area ÷ 100 (20 kg bag ≈ 100 sq ft coverage), rounded up
For a 12×10 ft floor (120 sq ft) with 12×12 in tiles and 10% wastage: 120 ÷ 1 × 1.10 = 132 tiles, 33 boxes of 4, and 2 adhesive bags.
Common Tile Sizes and Coverage
| Tile size | Area per tile | Tiles per 100 sq ft (no wastage) | Common use |
|---|---|---|---|
| 12×12 in (30×30 cm) | 1 sq ft | 100 | Bathroom floors, small rooms |
| 24×24 in (60×60 cm) | 4 sq ft | 25 | Living rooms, halls |
| 12×24 in (30×60 cm) | 2 sq ft | 50 | Walls, kitchens |
| 8×8 in (20×20 cm) | 0.44 sq ft | 225 | Accent areas, borders |
Frequently Asked Questions
How many tiles do I need for a 12×10 ft room?
For 120 sq ft with 12×12 inch tiles (1 sq ft each) and 10% wastage, you need 132 tiles — that is 33 boxes of 4, plus 2 bags of tile adhesive. Enter the same figures in the calculator above to get the full breakdown.
What is the standard tile size in Pakistan?
Common sizes are 12×12 inch (30×30 cm) for bathrooms, 24×24 inch (60×60 cm) for living areas, and 12×24 inch for walls. The calculator includes all three presets plus an 8×8 inch option.
How much wastage should I add for tiles?
Add 10% for simple rectangular rooms, 15% for rooms with many corners or diagonal laying patterns. Offcuts from one row can often start the next, but border cuts are unusable — the default 10% covers normal jobs.
What is tile adhesive and how much do I need?
Tile adhesive (cement-based) bonds tiles to the floor or wall. One 20 kg bag covers about 100 sq ft at standard 3–6 mm bed thickness. The calculator rounds bags up so you never run short mid-job.
Can I use this tile calculator for wall tiles?
Yes. Enter the wall’s length and height as length and width, choose a wall tile size such as 12×24 in, and the same area method applies. Add 15% wastage for walls with many cut-outs around doors, windows and fixtures.
Why do tile boxes matter more than the tile count?
Tiles are sold by the box and dye lots vary between batches. Buying the calculated number of boxes — not loose tiles — keeps every tile from the same shade lot. Always keep one spare box for future repairs.
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Written by Mohsin Raza Adil — Civil Engineer at Civil Technologist. This tile calculator follows standard construction estimation practice; always confirm quantities with your site engineer before ordering.