How much flooring do I need for a 15x15 room?

Buy about 248 sq ft: the 225 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 13 boxes. Diagonal or herringbone layouts need 15–20% extra instead.

How much paint do I need for a 15x15 room?

With 8 ft ceilings, one door and one window, the walls are about 444 sq ft. Two coats at 350 sq ft per gallon is 2.5 gallons, so buy 3. Painting the ceiling as well brings it to 3.8 gallons.

How many square meters is 15 by 15 feet?

20.9 m². The room is 4.57 m by 4.57 m.

How many sheets of drywall for a 15x15 room?

About 23 sheets of 4x8 drywall for the walls and ceiling with 8 ft walls, one door and one window, including 10% waste.

Room sizes

How Many Square Feet Is a 15x15 Room?

A 15x15 room is 225 square feet (20.9 m²). Flooring with waste, paint, drywall and baseboard for a 15x15 room.

Updated October 12, 2026 · FloorFigures

Short answer

A 15x15 room is 225 square feet (15 × 15), or 20.9 m² and 25 square yards. Its perimeter is 60 ft. Flooring with 10% waste comes to about 248 sq ft.

Drawn to scale. Each grid square is 1 ft × 1 ft.

Materials for a 15x15 room

Estimates for a plain rectangular room with 8 ft ceilings, one door and one window. Adjust for your own room with the flooring, paint and drywall calculators.

Item	Quantity	Assumes
Floor area	225 sq ft	Wall to wall
Flooring to buy	248 sq ft (13 boxes)	10% waste, 20 sq ft boxes
Carpet	41.3 sq yd	12 ft roll, 1 seam
Wall area	444 sq ft	8 ft walls, less a door and a window
Paint, walls	2.5 gal (buy 3)	2 coats, 350 sq ft per gallon
Paint, walls and ceiling	3.8 gal	2 coats
Drywall	23 sheets	4x8 sheets, walls and ceiling, 10% waste
Baseboard	57 ft	Perimeter less a 3 ft door

What a 15x15 room is used for

Rooms this size are usually primary bedrooms, kitchens, dining rooms or family rooms. A queen bed (60" × 80") takes up about 33 sq ft, or 15% of the floor.

15x15 in other units

Unit	Value
Square feet	225
Square meters	20.9
Square yards	25
Square inches	32,400
Acres	0.0052
Dimensions in meters	4.57 × 4.57 m

Rooms close to 15x15

Room	Square feet	Square meters
10x20	200	18.6
13x16	208	19.3
14x15	210	19.5
12x18	216	20.1
14x16	224	20.8
12x20	240	22.3
15x16	240	22.3
14x18	252	23.4

Room not a simple rectangle? Use the square footage calculator for L-shapes and angled walls, or split it into rectangles.

Questions

How many square feet is a 15x15 room?: A 15 by 15 foot room is 225 square feet: 15 × 15 = 225. That's 20.9 square meters or 25 square yards.
How much flooring do I need for a 15x15 room?: Buy about 248 sq ft: the 225 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 13 boxes. Diagonal or herringbone layouts need 15–20% extra instead.
How much paint do I need for a 15x15 room?: With 8 ft ceilings, one door and one window, the walls are about 444 sq ft. Two coats at 350 sq ft per gallon is 2.5 gallons, so buy 3. Painting the ceiling as well brings it to 3.8 gallons.
How many square meters is 15 by 15 feet?: 20.9 m². The room is 4.57 m by 4.57 m.
How many sheets of drywall for a 15x15 room?: About 23 sheets of 4x8 drywall for the walls and ceiling with 8 ft walls, one door and one window, including 10% waste.