How much flooring do I need for a 10x20 room?

Buy about 220 sq ft: the 200 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 11 boxes. Diagonal or herringbone layouts need 15–20% extra instead.

How much paint do I need for a 10x20 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 3.7 gallons.

How many square meters is 10 by 20 feet?

18.58 m². The room is 3.05 m by 6.1 m.

How many sheets of drywall for a 10x20 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 10x20 Room?

A 10x20 room is 200 square feet (18.6 m²). Flooring with waste, paint, drywall and baseboard for a 10x20 room.

Updated October 12, 2026 · FloorFigures

Short answer

A 10x20 room is 200 square feet (10 × 20), or 18.6 m² and 22.2 square yards. Its perimeter is 60 ft. Flooring with 10% waste comes to about 220 sq ft.

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

Materials for a 10x20 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	200 sq ft	Wall to wall
Flooring to buy	220 sq ft (11 boxes)	10% waste, 20 sq ft boxes
Carpet	27.3 sq yd	12 ft roll, no seams
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	3.7 gal	2 coats
Drywall	23 sheets	4x8 sheets, walls and ceiling, 10% waste
Baseboard	57 ft	Perimeter less a 3 ft door

What a 10x20 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 17% of the floor.

10x20 in other units

Unit	Value
Square feet	200
Square meters	18.58
Square yards	22.22
Square inches	28,800
Acres	0.0046
Dimensions in meters	3.05 × 6.1 m

Rooms close to 10x20

Room	Square feet	Square meters
12x15	180	16.7
13x14	182	16.9
12x16	192	17.8
13x15	195	18.1
14x14	196	18.2
13x16	208	19.3
14x15	210	19.5
12x18	216	20.1

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 10x20 room?: A 10 by 20 foot room is 200 square feet: 10 × 20 = 200. That's 18.6 square meters or 22.2 square yards.
How much flooring do I need for a 10x20 room?: Buy about 220 sq ft: the 200 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 11 boxes. Diagonal or herringbone layouts need 15–20% extra instead.
How much paint do I need for a 10x20 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 3.7 gallons.
How many square meters is 10 by 20 feet?: 18.58 m². The room is 3.05 m by 6.1 m.
How many sheets of drywall for a 10x20 room?: About 23 sheets of 4x8 drywall for the walls and ceiling with 8 ft walls, one door and one window, including 10% waste.