How many tiles for a 5×8 bathroom floor?

Data checked October 2026

Short answer

40 sq ft of 12×24 tile takes 24 tiles — 4 boxes — including 15% for cuts, plus 2 bags of thinset and 1 × 25-lb bag of grout.

Area: 5 × 8 ft = 40 sq ft.
Each 12×24 tile (actual 23.5 × 11.7 in) plus a 1/8 in joint covers 1.94 sq ft; 40 × 1.15 ÷ 1.94 = 24 pieces → 4 boxes of 7.
Thinset: 2 × 50-lb VersaBond with a 3/4 × 9/16 × 3/8 U-notch held at 30° (42 sq ft per bag, plus back-buttering).
Grout: about 2.1 lb of Keracolor S for a 1/8 in joint 0.354 in deep — 1 × 25-lb bag.
Backer: 3 sheets of HardieBacker ¼ and about 159 screws, set in 1 bag of thinset.
Materials come to about $262; installed by a pro, about $655–$808.

Adjust it to your exact job

What are you tiling?

Project

Over a wood subfloor, 1/4 in cement board set in thinset is the usual base.

Surfaces

Length

= 5' · 1.52 m

Width

= 8' · 2.44 m

Tile

Tile size

Floor & Decor Venato 12×24: 11.70 × 23.50 in, 9 mm, 7 pieces = 13.44 sq ft per box (other brands pack 8).

Grout joint

Layout

You need

4boxes of 12×24

24 tiles for 40 sq ft incl. 15% extra · 53.5 sq ft in the boxes

Area to tile: 40sq ft
Tile cost: $133about $33.28 per box
Thinset: 2bagsVersaBond · ¾ U · 30°
Grout: 2.1 lbKeracolor S: 1 × 25-lb bag
Backer board: 3sheetsHardieBacker ¼ · 159 fasteners

Back-butter large tile

Tile over 15 in needs a skim of thinset on its back as well as the troweled bed. That adds about 0.2 bag here — already included. Lift a tile now and then to check you have 80% contact (95% in showers and outdoors).

Other tile sizes, same area

Pieces and boxes by tile size (recommended waste, carton counts as listed)
Tile	Pieces	Boxes	Tile cost
Mosaic 12×12 sheets	44	44 sheets	$660
4×12 subway	131	9	$136
6×24 plank	48	5	$153
12×12 ceramic	45	3	$48.90
12×24 porcelain	24	4	$133
24×24 porcelain	12	3	$139
24×48 large format	6	2	$184

Hiring it out?

Installed tile runs about $655–$808 for 40 sq ft (homewyse, May 2026). Your materials above come to about $262.

Shopping list

4 boxes 12×24 porcelain tile24 pieces incl. 15% waste$133
2 bags VersaBond thinset, 50 lb3/4 × 9/16 × 3/8 U-notch held at 30°, back-buttered$39.98
1 units Keracolor S grout — 25-lb bag$14.48
3 sheets HardieBacker 1/4 in cement board, 3×5 ft$40.20
1 boxes Backer fasteners — box of 185$13.87
1 rolls 2 in alkali-resistant mesh tape — 50-ft roll$5.99
1 bags Modified thinset under the board (1/4 in square notch)$13.99
1 each Notched trowel, 3/4 × 9/16 × 3/8 U-notch held at 30°$11.49
24 pcs Tile spacers, 1/8 inabout one per tile

Estimated total$273

Cost estimate

Tap a price to use your store's

12×24 tile
4 boxes × $$2.49/sq ft × 13.37 sq ft per box
$133
VersaBond
2 bags × $
$39.98
Keracolor S 25-lb bag
1 units × $
$14.48
HardieBacker ¼
3 sheets × $
$40.20
Screws, box of 185
1 boxes × $
$13.87
Mesh tape, 50-ft roll
1 rolls × $
$5.99
Thinset under board
1 bags × $
$13.99
Notched trowel
1 each × $
$11.49

Materials total$273

Typical U.S. prices (Floor & Decor and others) checked October 2026. Tap any price to enter your store's.

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Compare

The same 40 sq ft in other tile sizes

Tile	Pieces	Boxes	Thinset bags	Tile cost
Mosaic 12×12 sheets	44	44 sheets	1	$660
4×12 subway	131	9	1	$136
6×24 plank	48	5	2	$153
12×12 ceramic	45	3	1	$48.90
12×24 porcelain	24	4	2	$133
24×24 porcelain	12	3	2	$139
24×48 large format	6	2	2	$184

How this was worked out

A 5×8 bathroom is the standard American hall bath. With a tub along one 5-ft wall the tiled floor is often only about 25 sq ft — subtract the tub as an opening if yours has one.

The 15% extra is the recommendation for straight layout with 24-in tile. The full boxes leave 4 spare pieces — keep them for repairs.

The full method, material data and tips are on the main tile calculator page.

Similar jobs

Other sizes people check

Sources

Data behind this answer

Floor & Decor carton specs — Venato 12×24, Napoli 24×48, Bright White Ice 3×6 — 12×24 = 11.70 × 23.50 in, 7 per box; 24×48 = 23.50 × 47.08 in, 3 per box; 3×6 subway 80 per box · checked October 2026
Floors Center carton specs — Daltile 12×12, 24×24, 6×24, 4×4 and MSI 4×12 — 12×12 = 11.81 in, 17 per box; 24×24 = 23.62 in, 4 per box; 6×24 planks 11 = 10.23 sq ft; 4¼ wall tile 100 = 12.5 sq ft; MSI 4×12 15 = 4.85 sq ft · checked October 2026
Floor & Decor tile category pricing (Ypsilanti, MI store) — 12×24 porcelain median $2.49/sq ft, 24×48 $3.99, porcelain overall $2.99, ceramic $0.99, mosaic sheets $14.99 · checked October 2026
Daltile FAQ and MSI FAQ — overage and attic stock — buy about 10% extra as attic stock; MSI: 10–15% by pattern plus 5–10% for future repairs · checked October 2026
Custom Building Products — VersaBond family sell sheet SS215 (9/26R) and TDS-119 — VersaBond 85–95 sq ft at 1/4 in, 60–67 at 1/4×3/8, U-notch 34–38 (45°) / 42–47 (30°); VersaBond LHT, LITE (35 lb = 50 lb) · checked October 2026
Custom grout data — Polyblend Plus TDS-360, Grout Card CC25, Prism SS160, Fusion Pro TDS-242 — Polyblend Plus 12×12×3/8 at 1/8 in: 348 sq ft per 25 lb; Prism 17 lb = 25 lb coverage; Fusion Pro 199 sq ft/gal at 12×12×3/8, 1/8 in · checked October 2026
MAPEI TDS — Keracolor S (Feb 2026), Keracolor U, Ultracolor Plus FA (Aug 2026), Kerapoxy CQ (Apr 2026) — Coverage tables used to calibrate the grout factor per product; Kerapoxy CQ joints 1/16–3/8 in only · checked October 2026
James Hardie — installing HardieBacker on floors and walls — fasteners every 8 in over the whole floor sheet, 1/4 in square-notch thinset under floor board, 1/8 in gaps, 2 in mesh tape; studs max 16 in o.c. · checked October 2026
Custom RedGard — TDS-104 — waterproofing 55 sq ft/gal (two coats at 110), IAPMO pan liner 40, crack prevention 100; 1 and 3.5 gal pails · checked October 2026
Celebration Hardware — RedGard LQWAF1 1-gal — $74.99 per 1-gal pail (regular price, Oct 2026) · checked October 2026
Floor & Decor backer board, screws and mesh tape listings — Durock 3×5 $12.50–$21.00, HardieBacker $13.40 / $17.50; 1-1/4 in screws 750 ct $38.44, 185 ct $13.87; 2 in tape 300 ft $15.99 · checked October 2026
homewyse — cost to install tile floor, wall tile and backsplash (May 2026) — floor $16.38–$20.21, walls $11.48–$21.27, backsplash $28.31–$49.78 per sq ft installed · checked October 2026
Fixr — shower tiling cost guide (updated Aug 29, 2025) — porcelain shower walls $17–$46/sq ft installed; diagonal and herringbone +20%, running bond +10–15%; tear-out $2–$5/sq ft · checked October 2026

Short answer

40 sq ft of 12×24 tile takes 24 tiles — 4 boxes — including 15% for cuts, plus 2 bags of thinset and 1 × 25-lb bag of grout.

Area: 5 × 8 ft = 40 sq ft.

Each 12×24 tile (actual 23.5 × 11.7 in) plus a 1/8 in joint covers 1.94 sq ft; 40 × 1.15 ÷ 1.94 = 24 pieces → 4 boxes of 7.

Thinset: 2 × 50-lb VersaBond with a 3/4 × 9/16 × 3/8 U-notch held at 30° (42 sq ft per bag, plus back-buttering).

Grout: about 2.1 lb of Keracolor S for a 1/8 in joint 0.354 in deep — 1 × 25-lb bag.

Backer: 3 sheets of HardieBacker ¼ and about 159 screws, set in 1 bag of thinset.

Materials come to about $262; installed by a pro, about $655–$808.

Adjust it to your exact job

What are you tiling?

Project

Over a wood subfloor, 1/4 in cement board set in thinset is the usual base.

Surfaces

Length

= 5' · 1.52 m

Width

= 8' · 2.44 m

Tile

Tile size

Floor & Decor Venato 12×24: 11.70 × 23.50 in, 9 mm, 7 pieces = 13.44 sq ft per box (other brands pack 8).

Grout joint

Layout

You need

4boxes of 12×24

24 tiles for 40 sq ft incl. 15% extra · 53.5 sq ft in the boxes

Area to tile: 40sq ft
Tile cost: $133about $33.28 per box
Thinset: 2bagsVersaBond · ¾ U · 30°
Grout: 2.1 lbKeracolor S: 1 × 25-lb bag
Backer board: 3sheetsHardieBacker ¼ · 159 fasteners

Back-butter large tile

Other tile sizes, same area

Pieces and boxes by tile size (recommended waste, carton counts as listed)
Tile	Pieces	Boxes	Tile cost
Mosaic 12×12 sheets	44	44 sheets	$660
4×12 subway	131	9	$136
6×24 plank	48	5	$153
12×12 ceramic	45	3	$48.90
12×24 porcelain	24	4	$133
24×24 porcelain	12	3	$139
24×48 large format	6	2	$184

Hiring it out?

Installed tile runs about $655–$808 for 40 sq ft (homewyse, May 2026). Your materials above come to about $262.

Shopping list

4 boxes 12×24 porcelain tile24 pieces incl. 15% waste$133
2 bags VersaBond thinset, 50 lb3/4 × 9/16 × 3/8 U-notch held at 30°, back-buttered$39.98
1 units Keracolor S grout — 25-lb bag$14.48
3 sheets HardieBacker 1/4 in cement board, 3×5 ft$40.20
1 boxes Backer fasteners — box of 185$13.87
1 rolls 2 in alkali-resistant mesh tape — 50-ft roll$5.99
1 bags Modified thinset under the board (1/4 in square notch)$13.99
1 each Notched trowel, 3/4 × 9/16 × 3/8 U-notch held at 30°$11.49
24 pcs Tile spacers, 1/8 inabout one per tile

Estimated total$273

Cost estimate

Tap a price to use your store's

12×24 tile
4 boxes × $$2.49/sq ft × 13.37 sq ft per box
$133
VersaBond
2 bags × $
$39.98
Keracolor S 25-lb bag
1 units × $
$14.48
HardieBacker ¼
3 sheets × $
$40.20
Screws, box of 185
1 boxes × $
$13.87
Mesh tape, 50-ft roll
1 rolls × $
$5.99
Thinset under board
1 bags × $
$13.99
Notched trowel
1 each × $
$11.49

Materials total$273

Typical U.S. prices (Floor & Decor and others) checked October 2026. Tap any price to enter your store's.

Tile

Pieces

Boxes

Thinset bags

Tile cost

Mosaic 12×12 sheets

44 sheets

$660

4×12 subway

131

$136

6×24 plank

$153

12×12 ceramic

$48.90

12×24 porcelain

$133

24×24 porcelain

$139

24×48 large format

$184

How this was worked out

A 5×8 bathroom is the standard American hall bath. With a tub along one 5-ft wall the tiled floor is often only about 25 sq ft — subtract the tub as an opening if yours has one.

The 15% extra is the recommendation for straight layout with 24-in tile. The full boxes leave 4 spare pieces — keep them for repairs.

The full method, material data and tips are on the main tile calculator page.