How much flooring do I need for a 12x20 room?

Buy about 264 sq ft: the 240 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 14 boxes. Diagonal or herringbone layouts need 15–20% extra instead.

How much paint do I need for a 12x20 room?

With 8 ft ceilings, one door and one window, the walls are about 476 sq ft. Two coats at 350 sq ft per gallon is 2.7 gallons, so buy 3. Painting the ceiling as well brings it to 4.1 gallons.

How many square meters is 12 by 20 feet?

22.3 m². The room is 3.66 m by 6.1 m.

How many sheets of drywall for a 12x20 room?

About 25 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 12x20 Room?

A 12x20 room is 240 square feet (22.3 m²). Flooring with waste, paint, drywall and baseboard for a 12x20 room.

Updated October 12, 2026 · FloorFigures

Short answer

A 12x20 room is 240 square feet (12 × 20), or 22.3 m² and 26.7 square yards. Its perimeter is 64 ft. Flooring with 10% waste comes to about 264 sq ft.

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

Materials for a 12x20 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	240 sq ft	Wall to wall
Flooring to buy	264 sq ft (14 boxes)	10% waste, 20 sq ft boxes
Carpet	27.3 sq yd	12 ft roll, no seams
Wall area	476 sq ft	8 ft walls, less a door and a window
Paint, walls	2.7 gal (buy 3)	2 coats, 350 sq ft per gallon
Paint, walls and ceiling	4.1 gal	2 coats
Drywall	25 sheets	4x8 sheets, walls and ceiling, 10% waste
Baseboard	61 ft	Perimeter less a 3 ft door

What a 12x20 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 14% of the floor.

12x20 in other units

Unit	Value
Square feet	240
Square meters	22.3
Square yards	26.67
Square inches	34,560
Acres	0.0055
Dimensions in meters	3.66 × 6.1 m

Rooms close to 12x20

Room	Square feet	Square meters
14x15	210	19.5
12x18	216	20.1
14x16	224	20.8
15x15	225	20.9
15x16	240	22.3
14x18	252	23.4
16x16	256	23.8
15x18	270	25.1

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 12x20 room?: A 12 by 20 foot room is 240 square feet: 12 × 20 = 240. That's 22.3 square meters or 26.7 square yards.
How much flooring do I need for a 12x20 room?: Buy about 264 sq ft: the 240 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 14 boxes. Diagonal or herringbone layouts need 15–20% extra instead.
How much paint do I need for a 12x20 room?: With 8 ft ceilings, one door and one window, the walls are about 476 sq ft. Two coats at 350 sq ft per gallon is 2.7 gallons, so buy 3. Painting the ceiling as well brings it to 4.1 gallons.
How many square meters is 12 by 20 feet?: 22.3 m². The room is 3.66 m by 6.1 m.
How many sheets of drywall for a 12x20 room?: About 25 sheets of 4x8 drywall for the walls and ceiling with 8 ft walls, one door and one window, including 10% waste.