How much flooring do I need for a 20x24 room?

Buy about 528 sq ft: the 480 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 27 boxes. Diagonal or herringbone layouts need 15–20% extra instead.

How much paint do I need for a 20x24 room?

With 8 ft ceilings, one door and one window, the walls are about 668 sq ft. Two coats at 350 sq ft per gallon is 3.8 gallons, so buy 4. Painting the ceiling as well brings it to 6.6 gallons.

How many square meters is 20 by 24 feet?

44.59 m². The room is 6.1 m by 7.32 m.

How many sheets of drywall for a 20x24 room?

About 40 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 20x24 Room?

A 20x24 room is 480 square feet (44.6 m²). Flooring with waste, paint, drywall and baseboard for a 20x24 room.

Updated October 12, 2026 · FloorFigures

Short answer

A 20x24 room is 480 square feet (20 × 24), or 44.6 m² and 53.3 square yards. Its perimeter is 88 ft. Flooring with 10% waste comes to about 528 sq ft.

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

Materials for a 20x24 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	480 sq ft	Wall to wall
Flooring to buy	528 sq ft (27 boxes)	10% waste, 20 sq ft boxes
Carpet	54.7 sq yd	12 ft roll, 1 seam
Wall area	668 sq ft	8 ft walls, less a door and a window
Paint, walls	3.8 gal (buy 4)	2 coats, 350 sq ft per gallon
Paint, walls and ceiling	6.6 gal	2 coats
Drywall	40 sheets	4x8 sheets, walls and ceiling, 10% waste
Baseboard	85 ft	Perimeter less a 3 ft door

What a 20x24 room is used for

Rooms this size are usually garages (a two-car garage is commonly 20–24 ft on each side), great rooms, basements or open-plan living areas. A queen bed (60" × 80") takes up about 33 sq ft, or 7% of the floor.

20x24 in other units

Unit	Value
Square feet	480
Square meters	44.59
Square yards	53.33
Square inches	69,120
Acres	0.011
Dimensions in meters	6.1 × 7.32 m

Rooms close to 20x24

Room	Square feet	Square meters
18x20	360	33.4
16x24	384	35.7
20x20	400	37.2
18x24	432	40.1
20x22	440	40.9
22x22	484	45
22x24	528	49.1
24x24	576	53.5

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 20x24 room?: A 20 by 24 foot room is 480 square feet: 20 × 24 = 480. That's 44.6 square meters or 53.3 square yards.
How much flooring do I need for a 20x24 room?: Buy about 528 sq ft: the 480 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 27 boxes. Diagonal or herringbone layouts need 15–20% extra instead.
How much paint do I need for a 20x24 room?: With 8 ft ceilings, one door and one window, the walls are about 668 sq ft. Two coats at 350 sq ft per gallon is 3.8 gallons, so buy 4. Painting the ceiling as well brings it to 6.6 gallons.
How many square meters is 20 by 24 feet?: 44.59 m². The room is 6.1 m by 7.32 m.
How many sheets of drywall for a 20x24 room?: About 40 sheets of 4x8 drywall for the walls and ceiling with 8 ft walls, one door and one window, including 10% waste.