How much flooring do I need for a 9x12 room?

Buy about 119 sq ft: the 108 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 6 boxes. Diagonal or herringbone layouts need 15–20% extra instead.

How much paint do I need for a 9x12 room?

With 8 ft ceilings, one door and one window, the walls are about 300 sq ft. Two coats at 350 sq ft per gallon is 1.7 gallons, so buy 2. Painting the ceiling as well brings it to 2.3 gallons.

How many square meters is 9 by 12 feet?

10.03 m². The room is 2.74 m by 3.66 m.

How many sheets of drywall for a 9x12 room?

About 15 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 9x12 Room?

A 9x12 room is 108 square feet (10.0 m²). Flooring with waste, paint, drywall and baseboard for a 9x12 room.

Updated October 12, 2026 · FloorFigures

Short answer

A 9x12 room is 108 square feet (9 × 12), or 10 m² and 12 square yards. Its perimeter is 42 ft. Flooring with 10% waste comes to about 119 sq ft.

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

Materials for a 9x12 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	108 sq ft	Wall to wall
Flooring to buy	119 sq ft (6 boxes)	10% waste, 20 sq ft boxes
Carpet	12.7 sq yd	12 ft roll, no seams
Wall area	300 sq ft	8 ft walls, less a door and a window
Paint, walls	1.7 gal (buy 2)	2 coats, 350 sq ft per gallon
Paint, walls and ceiling	2.3 gal	2 coats
Drywall	15 sheets	4x8 sheets, walls and ceiling, 10% waste
Baseboard	39 ft	Perimeter less a 3 ft door

What a 9x12 room is used for

Rooms this size are usually secondary bedrooms, home offices, dining rooms or small kitchens. A queen bed (60" × 80") takes up about 33 sq ft, or 31% of the floor.

9x12 in other units

Unit	Value
Square feet	108
Square meters	10.03
Square yards	12
Square inches	15,552
Acres	0.0025
Dimensions in meters	2.74 × 3.66 m

Rooms close to 9x12

Room	Square feet	Square meters
8x10	80	7.4
9x10	90	8.4
8x12	96	8.9
10x10	100	9.3
10x11	110	10.2
10x12	120	11.1
11x11	121	11.2
11x12	132	12.3

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 9x12 room?: A 9 by 12 foot room is 108 square feet: 9 × 12 = 108. That's 10 square meters or 12 square yards.
How much flooring do I need for a 9x12 room?: Buy about 119 sq ft: the 108 sq ft floor plus 10% for cuts and waste. With boxes that cover 20 sq ft, that's 6 boxes. Diagonal or herringbone layouts need 15–20% extra instead.
How much paint do I need for a 9x12 room?: With 8 ft ceilings, one door and one window, the walls are about 300 sq ft. Two coats at 350 sq ft per gallon is 1.7 gallons, so buy 2. Painting the ceiling as well brings it to 2.3 gallons.
How many square meters is 9 by 12 feet?: 10.03 m². The room is 2.74 m by 3.66 m.
How many sheets of drywall for a 9x12 room?: About 15 sheets of 4x8 drywall for the walls and ceiling with 8 ft walls, one door and one window, including 10% waste.