Tile Calculator
Calculate tiles needed for a floor or wall — including grout gap, waste, boxes and cost for any tile size in cm.
Space between tiles, typically 2–10 mm.
Tiles needed
37
Floor area 12 m², tile with gap 0.36 m²
Boxes needed
4
Floor area
12 m²
Estimated cost
₹4,800
Assumes square cuts and a 10% default waste for cuts and breakage. The grout gap slightly reduces the tiles needed because each tile covers more. Buy from one dye lot so shade stays uniform.
Last updated: August 2026
How this calculator is verified
Checked by True Calculator automated test suite on
- Formula verified against a published worked example in the automated test suite
- Edge cases (zero, negative, boundary and unit-mismatch inputs) covered by unit tests
The full verification method is on our how we verify page. Found an error? Tell us and we will re-check it.
When to Use This Calculator
Use this calculator when tiling a new home, renovating a kitchen or bathroom, or flooring a shop, office or balcony in India. Tiles are sold by the box and priced per box or per square foot, so knowing the exact count before visiting the market keeps your budget honest. It is equally useful when comparing 300 mm, 600 mm and 800 mm formats — the same room needs fewer large tiles, which often changes the total cost more than the per-tile price. Plumbers and electricians also use the figure to plan underfloor work before fixing starts. Enter the room size once, then quickly try different tile sizes to see how the count and cost move before you commit to a dealer.
How to Use This Calculator
- Step 1: Measure the room length and width in metres — for irregular rooms, split into rectangles and use the largest area or add them separately.
- Step 2: Enter the tile dimensions in cm as printed on the box, for example 60 for 600 mm × 600 mm vitrified tiles.
- Step 3: Choose a waste percentage (10% is standard) and add the box details if you want cost.
- Step 4: Read the tiles and boxes needed, then confirm the shade batch with your dealer before buying.
Worked Example
For a 5 m × 4 m living room, the floor area is 20 m². Using 60 cm × 60 cm tiles, each tile covers 0.36 m², so the base requirement is about 56 tiles. With 10% waste for cuts and breakage you need roughly 62 tiles — about 7 boxes of 10. At ₹1,200 per box, the material bill comes to ₹8,400 before installation charges. Larger rooms or diagonal patterns may push waste closer to 15%.
Tips and Common Mistakes
- •Tip 1: Buy 5–10% extra tiles for future repairs — matching a shade years later is nearly impossible.
- •Tip 2: Use the same dye lot number for the whole order so colour stays uniform.
- •Tip 3: For wall tiles, add extra for the skirting and the space above doors and windows.
- ✗Mistake 1: Do not forget door frames and thresholds when they are tiled — they add 0.5–1 m² of hidden area.
- ✗Mistake 2: Do not round tile counts down to save money; a shortfall mid-layout forces a second purchase and a different batch shade.
Frequently Asked Questions
How do I calculate tiles for a room?
Multiply room length by width to get the floor area, divide by the area of one tile, then add waste. For example, a 4 m × 3 m room (12 m²) with 30 cm × 30 cm tiles (0.09 m² each) needs about 134 tiles, plus 10% waste — roughly 147 tiles.
Which tile size is common in India?
300 × 300 mm and 600 × 600 mm vitrified tiles are the most common for floors, with 300 × 450 mm and 300 × 600 mm popular for walls. Larger tiles like 800 × 800 mm are used in premium living spaces.
Why do I need to add waste to my tile count?
Tiles break during transport and cutting, and edges often need partial tiles. A 10% waste allowance is the standard cushion; add more for diagonal layouts or patterned floors, which produce more off-cuts.
How do I convert tile size in cm to area?
Divide the cm dimensions by 100 to get metres, then multiply. A 60 cm tile is 0.6 m, so one tile covers 0.36 m². A 5 m × 4 m room (20 m²) therefore needs about 62 tiles including 10% waste.
Should I buy all my tiles at once?
Yes. Buy the full requirement from one batch (dye lot) — different batches can differ slightly in shade. Use this calculator to estimate the count, then confirm with your dealer before ordering.
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