Can I use this tile calculator for ceiling tiles?

Yes. Select Ceiling in the room type picker, enter ceiling dimensions, and enter your tile size (60x60 cm or 2 ft x 2 ft for grid tiles). Add 10% wastage for perimeter cuts.

Can I use this tile calculator in square feet?

Yes. Switch the unit selector to Feet / Sq Ft and enter room dimensions in feet and tile dimensions in inches. Results show in both sq ft and m2.

What wastage percentage should I use for tiles?

10% for simple rectangular rooms. 15% for bathrooms, kitchens or L-shaped rooms. 20% for diagonal patterns, herringbone or large-format tiles over 80 cm.

How many tiles do I need for a 10x10 ft room?

A 10x10 ft room is 100 sq ft (9.3 m2). With 12x12 inch tiles and 10% wastage you need about 110 tiles. With 18x18 inch tiles about 50 tiles.

What is the formula to calculate number of tiles?

Tiles needed = ceiling(Room Area / Tile Area x (1 + Wastage%)). Always round up. Example: 20.52 m2 room with 60x60 cm tiles at 10% wastage = ceiling(20.52 / 0.36 x 1.10) = 63 tiles.

Tile Calculator: Estimate Square Feet, Boxes & Waste

Calculate how many tiles you need for any floor, bathroom, wall or ceiling — enter dimensions in metres, cm or square feet and get an instant count with wastage included.

What are you tiling?

Unit of measurement

Room / Area Dimensions

Length (m)

Width (m)

For bathrooms & kitchens — run the calculator separately for floor, then each wall.

Tile Dimensions (cm)

Tile Length (cm)

Tile Width (cm)

Common sizes (click to fill):

Wastage allowance (cuts + breakages)

10%

10% straight cuts · 15% bathroom/complex · 20% diagonal / large format

Tile Calculator — Floor, Bathroom, Ceiling & Wall Tiles in m², cm or Sq Ft

Whether you're tiling a bathroom floor, kitchen splashback, feature wall or suspended ceiling grid, the question is always the same: how many tiles do I need? Our free tile calculator answers that instantly — in metres, centimetres, or square feet — with a built-in wastage buffer so you never run short. Tiles come in fixed batch lots; a discontinued shade can be impossible to match months later, making accurate ordering critical.

If you want the full step-by-step planning workflow before ordering, read the Ultimate Tile Calculation Guide for layout strategy, measurement rules, and material planning basics.

The Tile Calculation Formula

The core formula: Tiles = ⌈ (Room Area ÷ Tile Area) × (1 + Wastage%) ⌉ — always rounding up. Example:

Room: 5.4 m × 3.8 m = 20.52 m²
Tile: 60 cm × 60 cm = 0.36 m² per tile
Base: ⌈20.52 ÷ 0.36⌉ = 57 tiles + 10% wastage = 63 tiles

Bathroom Tile Calculator — Why Bathrooms Need Special Treatment

A bathroom has multiple surfaces: floor, walls, shower ceiling, bath panel. Each surface is usually a different size or material. The floor must be slip-rated (R10 minimum for residential wet areas); wall tiles don't carry load so they can be thinner and lighter. Always calculate floor and walls separately and add the counts. Use at least 15% wastage for bathrooms — pipe penetrations, tap holes, and bath edges create far more cuts per m² than open floors.

Ceiling Tile Calculator

Suspended grid tiles (60×60 cm or 2 ft × 2 ft standard) follow the same formula — area ÷ tile area, round up, plus 10% for perimeter cuts. Switch to Feet / Sq Ft mode for imperial grid systems. For a 4 m × 5 m ceiling: 20 m² ÷ 0.36 = 55.6 → 56 + 10% = 62 ceiling tiles.

Tile Calculator in Square Feet

US, Canadian and many South Asian projects measure in sq ft and inches. Switch the unit toggle to Feet / Sq Ft — enter room in feet, tile size in inches. Common US tile sizes: 12×12 in, 18×18 in, 24×24 in, 12×24 in plank. Results show in both sq ft and m².

Tile Calculator in Centimetres

European and South Asian retailers list tiles in centimetres — 60×60 cm, 30×60 cm, 80×80 cm. Select Centimetres mode to enter both room and tile size in cm directly. Output always includes m² to cross-check with packaging.

How Much Wastage Should I Allow?

10% — Simple rectangular room, straight grid laying, minimal obstacles
15% — Bathroom, kitchen, L-shaped room, or multiple obstacle penetrations
20% — Diagonal layout, herringbone, chevron, large-format (≥80 cm), natural stone

Always keep 5–10 spare tiles after the job for repairs. Matching batch numbers two years later is often impossible.

Floor vs Wall vs Ceiling Tiles — Quick Comparison

Type	Key requirement	Wastage guide
Floor tiles	PEI Class 3+ wear rating; R10 slip for wet areas	10–15%
Wall tiles	Lighter, thinner; no PEI or slip rating needed	10–15%
Bathroom tiles	Waterproof system; wet zone compliance	15–20%
Ceiling tiles	Fire Class 1 surface spread; acoustic rating	10%

Tile Size Guide

Large format (600×600 mm+) — Modern, minimal grout lines; makes small rooms feel larger. Use 15–20% wastage.
Medium format (300×600 mm, 400×400 mm) — Versatile for floors and walls. Most popular in kitchens and bathrooms.
Small format / mosaic (100×100 mm, 150×150 mm) — Feature areas, shower niches, splashbacks, borders.

How Many Boxes to Buy

Tiles are sold by the box. Each box states its m² coverage on the label — typically 1.0–1.5 m² per box for medium-format tiles. Divide total tiles by tiles-per-box and always round up to a whole box. If you are still not sure, then see more about how much tile you must buy and the full tile calculation planning guide.

Frequently Asked Questions

How do I calculate how many tiles I need?

Divide the total area (length × width) by the area of one tile, then multiply by (1 + wastage%). Always round up. Example: 12 m² room, 60×60 cm tiles, 10% wastage → (12 ÷ 0.36) × 1.10 = 36.67 → 37 tiles. This calculator does it instantly — enter your dimensions above.

How many tiles do I need for a bathroom?

Calculate floor and each wall separately, then add the counts. Use at least 15% wastage for bathrooms due to pipe cutouts, tap holes and bath edges. A 1.8 m × 2.5 m floor with 30×60 cm tiles at 15% wastage needs about 28 tiles. Select "Bathroom" above to set the recommended default.

Can I use this as a ceiling tile calculator?

Yes. Select "Ceiling" in the room type row, enter ceiling length and width, and enter your tile size (60×60 cm or 2 ft × 2 ft for standard grid tiles). 10% wastage is applied automatically for perimeter cuts.

How do I use this tile calculator in square feet?

Switch the unit toggle to Feet / Sq Ft. Enter room dimensions in feet and tile dimensions in inches. Results show in both sq ft and m² so you can shop from any supplier.

What wastage percentage should I use?

10% — simple rectangular rooms, straight grid laying.
15% — bathrooms, kitchens, L-shaped rooms, multiple penetrations.
20% — diagonal patterns, herringbone, large-format (≥80 cm), natural stone.

How many tiles do I need for a 10×10 ft room?

A 10×10 ft room = 100 sq ft (≈9.3 m²). With 12×12 in tiles + 10% wastage → ~110 tiles. With 18×18 in tiles → ~50 tiles. Switch to Feet mode above and enter your tile size for an exact count.

Should I calculate floor and wall tiles separately?

Always. Floor tiles must be rated for foot traffic and slip resistance; wall tiles are not. They are usually different sizes and materials. Run the calculator once for the floor, then once per wall.

How do I convert tile size from cm to m²?

Divide each cm dimension by 100, then multiply. 60×60 cm = 0.60 × 0.60 = 0.36 m². 30×60 cm = 0.30 × 0.60 = 0.18 m². The calculator does this automatically when you use cm or metres mode.