Tiles Resources

How to Calculate Number of Tiles Required

Calculating tile quantity accurately prevents two problems that consistently cause delays on Indian construction sites: running out of tiles mid-project when the same batch is no longer available, and over-ordering tiles that cannot be returned. Both errors are avoidable with a correct area measurement and an accurate wastage allowance applied before purchase. Tile quantity calculation uses two approaches: the area method (quick estimate) and the layout method (more accurate, accounts for edge cuts). This guide covers both in full — with step-by-step instructions, a tiles-per-m² reference table for common Indian tile sizes, deductions for doors and windows, worked examples for individual rooms and whole-house projects, and box quantity calculation.

Last updated: June 24, 2026

Two Methods for Calculating Tile Quantity

Both methods start from the same area measurement. The area method divides total area by tile area to get a tile count. The layout method goes further — it calculates full tiles that fit within the room dimensions and adds edge-cut tiles separately. The layout method is more accurate because it accounts for the real behaviour of tiles at room edges.

Method	How It Works	Accuracy	When to Use
Area Method	Net area ÷ tile area = tile count, then add wastage	Adequate for large areas with low edge-cut ratio	Quick estimate; large rectangular rooms (above 20 m²) with standard straight-grid layout
Layout Method	Full tiles in grid + edge cut tiles on all sides + wastage	More accurate — especially for small rooms and large tiles	Small rooms, large tiles, diagonal layouts, any room where edge cuts are a significant proportion of total tiles

Note

For most Indian residential projects, the layout method produces a 5–15% higher tile count than the simple area method for small rooms — this difference is the edge cut tiles the area method misses.

Step 1 — Measuring the Area to Be Tiled

Accurate area measurement is the foundation of the calculation. Errors here propagate into every downstream number. Measure on site — do not use architect drawing dimensions, which are structural dimensions before plaster and finishes.

Subsections

Measuring Floor Area

Steps

Measure room length and room width at floor level — use a steel tape, not a fabric tape (fabric tapes stretch).
Take measurements at multiple points if walls are not perfectly parallel — use the larger dimension in each direction for a conservative estimate.
For rectangular rooms: Floor area = Length × Width.
For L-shaped rooms: Split the L into two rectangles. Calculate each rectangle area separately and sum them.
For rooms with fixed obstructions (toilet base, bath panel, kitchen island, column base): measure the obstruction area and deduct from gross floor area.
Do not deduct door openings from floor area — tiles run continuously under the door frame to the threshold.

Measuring Wall Area for Wall Tiling

Steps

Measure each wall to be tiled separately — length × height of tiled zone.
Deduct door and window openings from each wall individually.
For partial-height wall tiling (e.g. bathroom wainscot to 1.2m or kitchen backsplash): height = tiled height only, not full wall height.
Sum all wall areas for the total wall tiling area.

Standard Deductions for Wall Tiling

Opening Type	Standard Size (India)	Area Deducted per Opening
Main door (single)	1050 × 2100mm	2.21 m²
Bedroom door	900 × 2100mm	1.89 m²
Bathroom door	750 × 2100mm	1.58 m²
Standard window (2-panel)	1200 × 1200mm	1.44 m²
Large window (3-panel)	1500 × 1200mm	1.80 m²
Ventilator	600 × 600mm	0.36 m²

Note

Some tile setters do not deduct small openings (below 0.5 m²) as the extra tile covers window reveal and frame returns. For conservative estimates, deduct all openings and treat the extra as wastage buffer.

Step 2A — Area Method Calculation

The area method is the fastest route to a tile count. It works well for large, regular rooms where edge cut tiles are a small proportion of the total.

Tile area (m²) = Tile length (m) × Tile width (m)
Tiles required (no wastage) = Net room area ÷ Tile area
Tiles required (with wastage) = Tiles required × (1 + Wastage fraction)
Round up to the next whole number — you cannot buy a fraction of a tile

Area Method Example — Living Room

Tile area = 0.6 × 0.6 = 0.36 m²
Tiles required (net) = 20 ÷ 0.36 = 55.6 → round up to 56 tiles
With 10% wastage = 56 × 1.10 = 61.6 → order 62 tiles

Step 2B — Layout Method Calculation (More Accurate)

The layout method calculates full tiles that fit within the room grid, then adds the partial tiles required along all four edges. This method is always more accurate than the area method for small rooms and large tiles, and it is the method used by the TryBuildCalc tile calculator.

Tiles per row = Floor width ÷ Tile width (round DOWN to whole tiles — these are full tiles)
Rows required = Floor length ÷ Tile length (round DOWN — these are full tile rows)
Full tiles = Tiles per row × Rows required
Edge tiles — right side = Rows required (1 cut tile per row on the right edge, if room width is not an exact multiple of tile width)
Edge tiles — bottom = Tiles per row (1 cut tile per column at the bottom edge, if room length is not an exact multiple of tile length)
Corner tile = 1 (the single tile at the corner that has two cut edges — counted once, not twice)
Total tiles before wastage = Full tiles + Edge tiles right + Edge tiles bottom + Corner tile
Final quantity = Total tiles × (1 + Wastage fraction), rounded up

Note

Edge tiles are only added if the room dimension is not an exact multiple of the tile dimension. If 5.0m ÷ 0.6m = 8.33, there are 8 full tiles and 1 cut tile row — the 0.33 × tile is still 1 physical tile that must be cut. If the division is exact (e.g. 4.8m ÷ 0.6m = 8.0), no edge cut tiles are needed on that side.

Layout Method Example — Same Living Room

Tiles per row (width) = 4.0 ÷ 0.6 = 6.67 → 6 full tiles per row
Rows required (length) = 5.0 ÷ 0.6 = 8.33 → 8 full rows
Full tiles = 6 × 8 = 48 tiles
Edge tiles — right side (one cut tile per row) = 8 tiles (because 4.0 ÷ 0.6 is not exact)
Edge tiles — bottom (one cut tile per column) = 6 tiles (because 5.0 ÷ 0.6 is not exact)
Corner tile = 1
Total tiles (no wastage) = 48 + 8 + 6 + 1 = 63 tiles
With 10% wastage = 63 × 1.10 = 69.3 → order 70 tiles

Insight

The gap between area method (62 tiles) and layout method (70 tiles) is 13% in this example — typical for a mid-size room with 600mm tiles. The smaller the room and the larger the tile, the larger this gap becomes.

Tiles Per m² Reference Table

For quick estimation without a full layout calculation, use the tiles-per-m² reference for common Indian tile sizes. Multiply by room area, then apply wastage.

Tiles required per m² for common tile sizes used in India

Tile Size	Tile Area (m²)	Tiles per m²	Tiles per 10 m²	Common Application
200 × 200mm	0.04 m²	25.0 tiles	250 tiles	Bathrooms, small utility areas
300 × 300mm	0.09 m²	~11.1 tiles	~111 tiles	Bathrooms, kitchens, small balconies
400 × 400mm	0.16 m²	6.25 tiles	63 tiles	Bedrooms, kitchens, medium rooms
600 × 600mm	0.36 m²	~2.78 tiles	~28 tiles	Living rooms, dining areas — most common Indian residential size
800 × 800mm	0.64 m²	1.5625 tiles	~16 tiles	Large living rooms, hotel lobbies
600 × 1200mm	0.72 m²	~1.39 tiles	~14 tiles	Large rooms, corridors — rectangular layout
800 × 1600mm	1.28 m²	~0.78 tiles	~8 tiles	Premium large spaces
300 × 600mm	0.18 m²	~5.56 tiles	~56 tiles	Bathroom walls, kitchen walls, hallways
300 × 450mm	0.135 m²	~7.41 tiles	~74 tiles	Bathroom walls (standard Indian wall tile)
200 × 300mm	0.06 m²	~16.67 tiles	~167 tiles	Kitchen backsplash, small feature walls

Usage Note

These values are for gross area estimation before wastage. Always add the appropriate wastage percentage based on layout pattern and room size — see the Tile Wastage Guide for full wastage selection guidance.

Step 3 — Converting Tile Count to Boxes

Tiles in India are sold in boxes. The number of tiles per box varies by tile size — larger tiles have fewer tiles per box (but each tile covers more area). Always verify tiles per box from the actual product packaging, since this varies between manufacturers and tile ranges.

Typical tiles per box by size — Indian market reference

Tile Size	Typical Tiles per Box	Area per Box (approx.)	Notes
200 × 200mm	25 tiles/box	1.0 m²/box	Common for anti-slip bathroom and utility tiles
300 × 300mm	16 tiles/box	1.44 m²/box	Common for bathroom floors and small area tiles
400 × 400mm	10–12 tiles/box	1.60–1.92 m²/box	Varies by brand and thickness
600 × 600mm	4 tiles/box	1.44 m²/box	Most common living room tile — 4 per box is standard
800 × 800mm	3 tiles/box	1.92 m²/box	Premium tile; 3 per box common
600 × 1200mm	2–3 tiles/box	1.44–2.16 m²/box	Large format — 2 or 3 per box depending on thickness
300 × 600mm	8 tiles/box	1.44 m²/box	Wall tiles — 8 per box common
300 × 450mm	10–12 tiles/box	1.35–1.62 m²/box	Bathroom wall tiles

Boxes required = Total tiles (including wastage) ÷ Tiles per box
Round UP to the next whole number of boxes — never round down
Confirm tiles per box from the actual product data sheet or packaging before ordering

Box Calculation Example

Boxes = 70 ÷ 4 = 17.5 → round up to 18 boxes
18 boxes × 4 tiles = 72 tiles (2 spare tiles after installation — keep for future repair)

Worked Examples — Room by Room

Complete calculation examples from area measurement to box order quantity for four common room types in Indian homes.

Examples

Example 1 — Standard Bathroom Floor (2.5m × 1.8m)

Given

Room

2.5m × 1.8m bathroom floor

Tile

300 × 300mm anti-slip vitrified

Wastage

15% (small room, below 5 m²)

Tiles Per Box

16 tiles per box

Steps

Label

Floor area

Value

2.5 × 1.8 = 4.5 m²

Label

Tiles per row (width 1.8m)

Value

1.8 ÷ 0.3 = 6.0 → exact fit, 6 full tiles, no edge cut on this side

Label

Rows (length 2.5m)

Value

2.5 ÷ 0.3 = 8.33 → 8 full rows + 1 cut row

Label

Full tiles

Value

6 × 8 = 48 tiles

Label

Edge cut tiles (bottom only — width is exact)

Value

6 tiles (one per column in the cut row)

Label

Corner tile

Value

0 (width side is exact — no corner cut needed)

Label

Total before wastage

Value

48 + 6 = 54 tiles

Label

With 15% wastage

Value

54 × 1.15 = 62.1 → 63 tiles

Label

Boxes

Value

63 ÷ 16 = 3.94 → order 4 boxes (64 tiles)

Result

Order 4 boxes (64 tiles) for 4.5 m² bathroom floor.

Example 2 — Master Bedroom Floor (4.2m × 3.6m)

Given

Room

4.2m × 3.6m bedroom

Tile

600 × 600mm vitrified

Wastage

10%

Tiles Per Box

4 tiles per box

Steps

Label

Floor area

Value

4.2 × 3.6 = 15.12 m²

Label

Tiles per row (width 3.6m)

Value

3.6 ÷ 0.6 = 6.0 → exact, 6 full tiles, no edge cut on width

Label

Rows (length 4.2m)

Value

4.2 ÷ 0.6 = 7.0 → exact, 7 full rows, no edge cut on length

Label

Full tiles

Value

6 × 7 = 42 tiles

Label

Edge cut tiles

Value

0 (both dimensions are exact multiples of tile size)

Label

Total before wastage

Value

42 tiles

Label

With 10% wastage

Value

42 × 1.10 = 46.2 → 47 tiles

Label

Boxes

Value

47 ÷ 4 = 11.75 → order 12 boxes (48 tiles)

Result

Order 12 boxes (48 tiles) for 15.12 m² bedroom. Room dimensions happen to be exact multiples of tile size — no edge cuts needed, so layout and area methods give the same answer here.

Example 3 — Living Room Floor (5.5m × 4.2m)

Given

Room

5.5m × 4.2m living room

Tile

800 × 800mm vitrified

Wastage

12% (large format tile)

Tiles Per Box

3 tiles per box

Steps

Label

Floor area

Value

5.5 × 4.2 = 23.1 m²

Label

Tiles per row (width 4.2m)

Value

4.2 ÷ 0.8 = 5.25 → 5 full tiles per row

Label

Rows (length 5.5m)

Value

5.5 ÷ 0.8 = 6.875 → 6 full rows

Label

Full tiles

Value

5 × 6 = 30 tiles

Label

Edge cut tiles — right side

Value

6 (one per row — width not exact)

Label

Edge cut tiles — bottom

Value

5 (one per column — length not exact)

Label

Corner tile

Value

Label

Total before wastage

Value

30 + 6 + 5 + 1 = 42 tiles

Label

With 12% wastage

Value

42 × 1.12 = 47.04 → 48 tiles

Label

Boxes

Value

48 ÷ 3 = 16 boxes exactly

Result

Order 16 boxes (48 tiles) for 23.1 m² living room. Area method alone would estimate 23.1 ÷ 0.64 × 1.12 = 40.4 → 41 tiles — 7 tiles short of actual requirement.

Example 4 — Bathroom Wall Tiling (Full Height, 3 Walls)

Given

Room

Bathroom 2.5m × 1.8m, wall height 2.1m, tiling on 3 walls (2 long + 1 short), 1 door opening (750×2100mm)

Tile

300 × 450mm ceramic wall tile

Wastage

12%

Tiles Per Box

10 tiles per box

Steps

Label

Wall 1 (long — 2.5m × 2.1m)

Value

2.5 × 2.1 = 5.25 m²

Label

Wall 2 (long — 2.5m × 2.1m)

Value

2.5 × 2.1 = 5.25 m²

Label

Wall 3 (short — 1.8m × 2.1m)

Value

1.8 × 2.1 = 3.78 m²

Label

Gross wall area

Value

5.25 + 5.25 + 3.78 = 14.28 m²

Label

Deduct door (0.75 × 2.10)

Value

−1.575 m²

Label

Net wall area

Value

14.28 − 1.575 = 12.71 m²

Label

Tiles per m² (300×450mm)

Value

1 ÷ (0.3 × 0.45) = 7.41 tiles/m²

Label

Tiles required (net)

Value

12.71 × 7.41 = 94.2 → 95 tiles

Label

With 12% wastage

Value

95 × 1.12 = 106.4 → 107 tiles

Label

Boxes

Value

107 ÷ 10 = 10.7 → order 11 boxes (110 tiles)

Result

Order 11 boxes (110 tiles) for bathroom wall tiling on 3 walls. Area method used here — for wall tiling where cuts are numerous and irregular, the 12% wastage absorbs the edge cut difference.

Whole-House Tile Estimation — 2-BHK and 3-BHK Reference

For whole-house tile estimation before room-by-room site measurement is available, use these reference figures for typical Indian apartment sizes. These are indicative quantities — always verify with actual site measurements before ordering.

Approximate tile quantities for typical Indian apartment types

Area Type	2-BHK (~800 sq ft)	3-BHK (~1200 sq ft)	Tile Size Assumed	Wastage Included
Living + dining floor	~28 m² → 80 tiles (600mm)	~40 m² → 112 tiles (600mm)	600 × 600mm	10%
Bedroom floors (2 or 3 rooms)	~40 m² → 112 tiles (600mm)	~56 m² → 156 tiles (600mm)	600 × 600mm	10%
Kitchen floor	~8 m² → 56 tiles (400mm)	~10 m² → 70 tiles (400mm)	400 × 400mm	12%
Bathroom floors (2 baths)	~10 m² → 70 tiles (300mm)	~12 m² → 84 tiles (300mm)	300 × 300mm	15%
Bathroom walls (2 baths)	~40 m² → 296 tiles (300×450mm)	~50 m² → 370 tiles (300×450mm)	300 × 450mm	12%
Balcony floor	~6 m² → 67 tiles (300mm)	~8 m² → 89 tiles (300mm)	300 × 300mm	15%

Note

These quantities assume straight-grid layout. Add 5–10% if offset or herringbone layout is planned. Order all tiles from the same production lot — never mix lot numbers for the same room.

Common Tile Calculation Mistakes

These are the most frequent errors in tile quantity estimation on Indian residential sites. Each one leads to a material shortfall or an incorrect order quantity.

Mistakes

Using floor plan dimensions instead of site measurements

Consequence

Architectural drawings show structural dimensions — finished floor dimensions after plaster and screed are smaller. The error is typically 50–100mm per dimension, which reduces the tile count by 1–2 tiles per row — a shortfall that only becomes apparent mid-installation.

Correct

Always measure floor and wall dimensions on site with a steel tape before calculating tile quantity.

Not accounting for edge cut tiles (area method only)

Consequence

The simple area method (area ÷ tile area) ignores the fact that every row and column at the room perimeter requires a cut tile. For a small room with large tiles, this shortfall can be 10–20% of the total tile count.

Correct

Use the layout method for any room where the room dimensions are not exact multiples of the tile size, or where the room is small relative to the tile size.

Not adding wastage at all

Consequence

Even a perfect installation on a perfectly measured room produces offcuts that cannot be reused and occasional breakage. A tile count without wastage will always result in a shortfall.

Correct

Always add minimum 5% wastage for large rooms with straight-grid layout; 10–15% for small rooms or complex layouts. See the Tile Wastage Guide for full guidance.

Ordering tiles from different batches to make up a shortfall

Consequence

Tiles from different production runs (different lot numbers) vary in shade even for the same colour code. The colour mismatch is visible under normal lighting and cannot be corrected without replacing all tiles in the affected area.

Correct

Order all tiles from the same lot at the start. Always over-order slightly and keep leftover tiles from the installation batch for future repairs.

Calculating wall and floor tiles together

Consequence

Wall tiles and floor tiles are different products with different sizes, PEI ratings, wastage percentages, and tiles per box. Combining them into a single calculation produces errors in both quantities.

Correct

Calculate floor tiles and wall tiles as completely separate exercises — separate area measurements, separate tile sizes, separate wastage percentages, and separate box orders.

Not converting to boxes correctly (rounding down)

Consequence

Rounding down to the nearest whole box is a guaranteed shortfall. You need 17.5 boxes — ordering 17 leaves you with 2 tiles short at the end of the room.

Correct

Always round UP to the next whole box. The extra tiles from the rounded-up box should be retained after installation for future repairs.

Ignoring diagonal or offset layout patterns in the wastage estimate

Consequence

A diagonal layout with 5% wastage budgeted will run short — diagonal layouts require 15–20% wastage because every perimeter tile is cut at 45° and the triangular offcuts cannot be reused elsewhere.

Correct

Confirm the layout pattern before calculating tiles. Apply the correct wastage percentage for the layout — not a flat 5% regardless of pattern.

Estimating Grout and Adhesive Alongside Tile Quantity

Tile installation also requires grout and adhesive or mortar. Estimating these alongside the tile quantity prevents separate shortfalls on site.

Reference quantities for adhesive and grout alongside tile order

Product	Coverage per kg	Quantity for 10 m²	Notes
Polymer tile adhesive (thin-bed)	3–4 m²/kg (3–4mm bed)	2.5–3.5 kg per m²	For tiles 600mm and above — back-butter large tiles for full coverage
Cement-sand mortar bed (semi-dry)	~40 kg cement + 160 kg sand per m³ of bed	Bed volume = area × bed thickness (25–40mm)	Traditional method for Indian floor tiles
Cement grout (sanded, 3mm joint)	~0.5–0.8 kg/m² (for 300×300mm tile)	5–8 kg per 10 m²	Joint width and tile size both affect grout quantity — use grout calculator for accuracy
Cement grout (sanded, 5mm joint)	~1.0–1.5 kg/m² (for 600×600mm tile)	10–15 kg per 10 m²	Wider joints = more grout — always calculate separately
Epoxy grout (2-part)	~0.6–1.2 kg/m²	6–12 kg per 10 m²	Higher cost; for wet areas and food-contact surfaces

Note

Use the TryBuildCalc Grout Calculator and Tile Adhesive Calculator for accurate quantities — grout volume is highly sensitive to tile size, joint width, and tile thickness, and these calculators account for all three variables.

Related calculators

Use these calculators when you need to turn this reference information into project quantities:

Tile Calculator
Estimate tiles required, boxes, wastage, and cost for floor and wall tiling.
Grout Calculator
Estimate grout quantity based on tile size, joint width, and tiling area.
Tile Adhesive Calculator
Calculate tile adhesive quantity for floor and wall tiling.
Skirting Calculator
Calculate skirting tile quantity for room perimeters.

Related resources

Tile Wastage Percentage Guide
Complete guide to tile wastage percentages for Indian construction — covering wastage by layout pattern, tile size, room size, tile material, and installation method, with a quick-reference wastage selector table, explanation of what drives wastage, and guidance on retaining tiles after installation.
Floor Tiles Complete Guide for Indian Homes
Complete floor tiles reference for Indian homes — covering tile types, sizes, materials, PEI ratings, anti-slip ratings, substrate preparation, adhesive vs. cement bedding, grout selection, layout patterns, IS standards, room-by-room specifications, and installation quality checks.
How to Calculate Paint Quantity for Walls and Ceilings
Step-by-step guide to calculating paint quantity for walls and ceilings in Indian homes — covering area measurement, deductions for doors and windows, coverage rates, number of coats, putty and primer estimation, wastage, and worked examples for rooms, flats, and complete house painting.

FAQ

Measure room length and width on site to get floor area. Divide floor area by tile area (tile length × tile width) to get the base tile count. Then use the layout method for accuracy: calculate full tiles in the grid (tiles per row × rows), add edge cut tiles on each side where the room dimension is not an exact multiple of tile size, and add one corner tile. Apply wastage (10% for a standard room, 15% for a small room or large tile) and round up to the next whole box. Always measure on site — never use drawing dimensions.

A 10×10 ft room is approximately 3.05m × 3.05m = 9.3 m². For 600×600mm tiles: 9.3 ÷ 0.36 = 25.8 tiles base count. Using the layout method: 3.05 ÷ 0.6 = 5 full tiles per row (remainder 0.05m — cut tile needed); 5 × 5 = 25 full tiles + 5 edge tiles on one side + 5 on the other + 1 corner = 36 tiles. With 10% wastage = 40 tiles → 10 boxes (4 tiles per box). For 400×400mm tiles: approximately 72 tiles including wastage → 7–8 boxes.

Tiles per m² depends entirely on tile size. Common values for Indian tiles: 300×300mm = 11.1 tiles/m²; 400×400mm = 6.25 tiles/m²; 600×600mm = 2.78 tiles/m²; 800×800mm = 1.56 tiles/m². Multiply tiles per m² by room area, then add your wastage percentage. These are base counts before wastage — always add 10–15% on top.

Add 10% for a large room (above 15 m²) with straight-grid layout and standard tiles. Add 12–15% for small rooms (below 10 m²), large-format tiles (800mm+), or offset/brick-bond layout. Add 15–20% for diagonal layout or natural stone tiles. After installation, keep all leftover tiles from the same batch for future repairs — even 3–5 spare tiles from the same production lot are valuable when a single tile cracks and needs replacement years later.

The calculator uses the layout method, which adds edge cut tiles that the simple area method misses. For a room where neither dimension is an exact multiple of the tile size, the layout method adds one partial tile along the entire right edge and one along the entire bottom edge. These are real tiles you must buy and cut — they cannot be avoided. The gap between the two methods is largest in small rooms with large tiles, where edge cut tiles can represent 15–25% of the total count.

Split the L-shape into two rectangles. Calculate each rectangle separately using the layout method — do not add the two areas and treat it as a single room, as this ignores the internal corner cuts. Add the tile counts from both rectangles, then apply wastage. Add an extra 3–5% for the internal corner cuts and the complex setting-out that L-shaped rooms require.

Yes — always separately. Floor and wall tiles are different products with different sizes, different tiles per box, and different wastage percentages. Floor tile calculations start from floor area; wall tile calculations require measuring each wall individually and deducting door and window openings. Combining them produces errors in both quantities and incorrect box orders for both products.

For a 20 m² floor with 600×600mm tiles (0.36 m² per tile, 4 tiles per box): base tile count = 20 ÷ 0.36 = 55.6 → 56 tiles. Add 10% wastage = 61.6 → 62 tiles. Boxes = 62 ÷ 4 = 15.5 → order 16 boxes (64 tiles). If the room dimensions produce significant edge cuts (layout method), the actual count could be 65–70 tiles — confirm with a full layout calculation using room dimensions.