How much flooring do I need for a 5x8 room?

Buy about 44 sq ft: the 40 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 3 boxes. Diagonal or herringbone layouts need 15–20% extra instead.

How much paint do I need for a 5x8 room?

With 8 ft ceilings, one door and one window, the walls are about 172 sq ft. Two coats at 350 sq ft per gallon is 1 gallons, so buy 1. Painting the ceiling as well brings it to 1.2 gallons.

How many square meters is 5 by 8 feet?

3.72 m². The room is 1.52 m by 2.44 m.

How many sheets of drywall for a 5x8 room?

About 8 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 5x8 Room?

A 5x8 room is 40 square feet (3.7 m²). Flooring with waste, paint, drywall and baseboard for a 5x8 room.

Updated October 12, 2026 · FloorFigures

Short answer

A 5x8 room is 40 square feet (5 × 8), or 3.7 m² and 4.4 square yards. Its perimeter is 26 ft. Flooring with 10% waste comes to about 44 sq ft.

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

Materials for a 5x8 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	40 sq ft	Wall to wall
Flooring to buy	44 sq ft (3 boxes)	10% waste, 20 sq ft boxes
Carpet	7.3 sq yd	12 ft roll, no seams
Wall area	172 sq ft	8 ft walls, less a door and a window
Paint, walls	1 gal (buy 1)	2 coats, 350 sq ft per gallon
Paint, walls and ceiling	1.2 gal	2 coats
Drywall	8 sheets	4x8 sheets, walls and ceiling, 10% waste
Baseboard	23 ft	Perimeter less a 3 ft door

What a 5x8 room is used for

Rooms this size are usually bathrooms, laundry rooms, pantries or walk-in closets. A standard bathtub (about 30" × 60") takes up about 12.5 sq ft.

5x8 in other units

Unit	Value
Square feet	40
Square meters	3.72
Square yards	4.44
Square inches	5,760
Acres	0.0009
Dimensions in meters	1.52 × 2.44 m

Rooms close to 5x8

Room	Square feet	Square meters
6x8	48	4.5
5x10	50	4.6
8x8	64	5.9
8x10	80	7.4
9x10	90	8.4
8x12	96	8.9
10x10	100	9.3
9x12	108	10

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 5x8 room?: A 5 by 8 foot room is 40 square feet: 5 × 8 = 40. That's 3.7 square meters or 4.4 square yards.
How much flooring do I need for a 5x8 room?: Buy about 44 sq ft: the 40 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 3 boxes. Diagonal or herringbone layouts need 15–20% extra instead.
How much paint do I need for a 5x8 room?: With 8 ft ceilings, one door and one window, the walls are about 172 sq ft. Two coats at 350 sq ft per gallon is 1 gallons, so buy 1. Painting the ceiling as well brings it to 1.2 gallons.
How many square meters is 5 by 8 feet?: 3.72 m². The room is 1.52 m by 2.44 m.
How many sheets of drywall for a 5x8 room?: About 8 sheets of 4x8 drywall for the walls and ceiling with 8 ft walls, one door and one window, including 10% waste.