# Flooring and tile calculator

> Tile calculator: tiles and boxes for a floor or wall from room size, tile size, grout joint and waste allowance, plus grout in litres and kg.

ஊடாடும் பதிப்பு: https://www.calcopenly.com/ta/construction/tile-calculator
பாடப்பிரிவு: கட்டுமானம் மற்றும் வீட்டுக் கணிப்பான்கள்

The tile count is the area divided by the area one tile covers with its grout joint, (tile length + joint) × (tile width + joint). A waste allowance for cuts and breakage is added, then the count is rounded up to whole tiles and whole boxes. Grout volume per m² is (A + B) ÷ (A × B) × tile thickness × joint width, with A and B the tile sides and all four in millimetres.

The default 4 × 3 m floor in 600 × 300 mm tiles with 3 mm joints takes 65.7 tiles laid edge to edge. With 10% waste that is 73 tiles, or 10 boxes of 8, plus 1.62 L of grout (2.6 kg).

The waste presets are this calculator's rules of thumb: 10% for a straight lay, 15% for diagonal and 20% for herringbone, which cut more tiles at the edges. The drawing shows a straight lay.

## உள்ளீடுகள்

- **Area length**
- **Area width**
- **Tile length**
- **Tile width**
- **Grout joint**
- **Tile thickness (joint depth)**
- **Waste allowance**: Covers cuts and breakage. Diagonal and herringbone layouts cut more tiles at the edges.
- **Tiles per box**
- **Price per box**

## முடிவுகள்

- Tiles to buy (tiles) — முதன்மை முடிவு
- Boxes to buy (boxes)
- பரப்பளவு (m²)
- பரப்பளவு (ft²)
- Grout volume (L)
- Grout (dry weight) (kg)
- Tile cost

## சூத்திரம்

$$
N = \left\lceil \frac{A}{(\ell_t + j)(w_t + j)} \times (1 + \text{waste}) \right\rceil,\qquad G = \frac{\ell_t + w_t}{\ell_t w_t} \cdot t \cdot j \cdot A
$$

## தீர்க்கப்பட்ட எடுத்துக்காட்டுகள்

### 4 × 3 m floor, 600 × 300 mm tiles, 3 mm joints, 10% waste

- Area length: 4 m
- Area width: 3 m
- Tile length: 600 mm
- Tile width: 300 mm
- Grout joint: 3 mm
- Waste allowance: 10%
- Tiles per box: 8
- **பரப்பளவு: 12 m²**
- **Tiles to buy: 73 tiles**
- **Boxes to buy: 10 boxes**
- **Grout volume: 1.62 L**
- **Grout (dry weight): 2.59 kg**
- **Tile cost: 400.00**
- சரிபார்ப்பின் மூலம்: Python decimal: 12 ÷ (0.603 × 0.303) = 65.68 × 1.1 = 72.25 → 73; grout (900/180000) × 9 × 3 × 12 = 1.62 L × 1.6 kg/L (Mapei formula); 10 boxes × 40 = 400

### 12 × 10 ft, 12 in tiles, ⅛ in joints, diagonal 15%

- Area length: 12 ft
- Area width: 10 ft
- Tile length: 12 in
- Tile width: 12 in
- Grout joint: 0.125 in
- Tile thickness (joint depth): 0.375 in
- Waste allowance: 15%
- Tiles per box: 10
- **பரப்பளவு: 120 ft²**
- **Tiles to buy: 136 tiles**
- **Boxes to buy: 14 boxes**
- **Grout volume: 2.21 L**
- சரிபார்ப்பின் மூலம்: Python decimal: 120 ft² ÷ (12.125 in)² = 117.54 × 1.15 = 135.17 → 136 tiles → 14 boxes of 10; Mapei grout formula in mm

### Edge: tiles fit exactly, no joint, no waste

- Area length: 3 m
- Area width: 3 m
- Tile length: 300 mm
- Tile width: 300 mm
- Grout joint: 0 mm
- Waste allowance: 0%
- Tiles per box: 10
- **Tiles to buy: 100 tiles**
- **Boxes to buy: 10 boxes**
- **Grout volume: 0 L**
- சரிபார்ப்பின் மூலம்: Hand calculation: 3 m ÷ 0.3 m = 10 tiles each way = 100 tiles, 10 boxes; a zero-width joint needs no grout

## கேள்விகள்

### How many tiles do I need per square metre?

Divide 1 m² by the area of one tile plus its joint. A 600 × 300 mm tile with a 3 mm joint covers 0.603 × 0.303 = 0.1827 m², so 1 m² takes 5.47 tiles; 300 × 300 mm tiles take 10.89. Multiply by the whole area before rounding up: rounding 5.47 up to 6 per m² would overbuy by about 10%.

### How many tiles do I need for 100 square feet?

About 98 twelve-inch tiles before waste. A 12 × 12 in tile with a ⅛ in joint covers 12.125 × 12.125 in, or 1.021 ft², so 100 ft² takes 97.95 tiles. Adding 10% for cuts and breakage gives 107.7, rounded up to 108 tiles.

### How much extra tile should I buy for waste?

This calculator's presets add 10% for a straight lay, 15% for a diagonal lay and 20% for herringbone, because angled layouts cut more tiles along every wall. On the default 12 m² floor those give 73, 76 and 79 tiles of 600 × 300 mm.

### How much grout do I need?

Multiply (A + B) ÷ (A × B) by tile thickness and joint width, all in mm, to get litres of joint per m². For 600 × 300 mm tiles 9 mm thick with 3 mm joints that is 900 ÷ 180,000 × 9 × 3 = 0.135 L per m², or 1.62 L for 12 m². The calculator converts at 1.6 kg per litre; check the grout bag's own coverage table.

### Do grout joints change the number of tiles needed?

Yes, they lower it slightly, because each tile plus its joint covers more floor. A 600 × 300 mm tile covers 0.18 m² on its own and 0.1827 m² with a 3 mm joint, so 12 m² needs 65.7 tiles instead of 66.7 before waste. For 50 × 50 mm mosaic with 3 mm joints, each tile's footprint grows by 12.4%.

### “Flooring and tile calculator” எவ்வளவு துல்லியமானது?

துல்லியம் உங்கள் உள்ளீடுகளையும் முறையின் அனுமானங்களையும் சார்ந்தது. தசமக் கணக்கீடு 50 முக்கிய இலக்கங்களைப் பயன்படுத்துகிறது. ஆனால் மதிப்பீடுகள், எண் முறைகள், மூலத் தரவுகள் குறைந்த துல்லியத்தைக் கொண்டிருக்கலாம்; காட்டப்படும் மதிப்பை வட்டமிடுவது இந்த வரம்புகளை நீக்காது. சுயாதீன மூலங்களின் தீர்வுகளுடன் சரிபார்க்கப்பட்ட எடுத்துக்காட்டுகள்: 3. எடுத்துக்காட்டாக, “4 × 3 m floor, 600 × 300 mm tiles, 3 mm joints, 10% waste” என்பது Python decimal: 12 ÷ (0.603 × 0.303) = 65.68 × 1.1 = 72.25 → 73; grout (900/180000) × 9 × 3 × 12 = 1.62 L × 1.6 kg/L (Mapei formula); 10 boxes × 40 = 400 உடன் சரிபார்க்கப்படுகிறது.

### இந்த முறையின் மூலம் என்ன?

Mapei grout calculator — consumption (A + B)/(A × B) × C × D × 1.6 = kg/m²; TCNA Handbook for Ceramic, Glass, and Stone Tile Installation — joint widths and layouts.

## ஆதாரங்கள்

- [Mapei grout calculator — consumption (A + B)/(A × B) × C × D × 1.6 = kg/m²](https://www.mapei.com/gb/en/tools-and-downloads/product-calculator/grouts)
- TCNA Handbook for Ceramic, Glass, and Stone Tile Installation — joint widths and layouts