How Many Square Feet in a 20×20 Room?

A 20 ft × 20 ft room equals 400 square feet

20 ft × 20 ft =

400 Square Feet

37.16 Square Meters

44.44 Square Yards

Calculation Breakdown

Area = Length × Width

Area = 20 ft × 20 ft

Area = 400 square feet

Large living roomOpen kitchen-diningRecreation room

441

12×12 inch tiles (with 10% waste)

4 gal

Walls only, 2 coats, 8ft height

441 sq ft

With 10% waste factor

Flooring Type	Boxes Needed	Notes
Laminate (25 sq ft/box)	18	Typical coverage: 20-25 sq ft per box
Hardwood (20 sq ft/box)	23	Typical coverage: 18-22 sq ft per box
Vinyl Plank (30 sq ft/box)	15	Typical coverage: 25-35 sq ft per box
Carpet (12 ft wide roll)	4	Sold by linear foot (12 ft wide)

Calculate custom room sizes with tile, paint, and flooring estimates

Calculate how many square feet in a room. Get instant results for square footage, tiles needed, paint required, and flooring materials.

Quick Room Sizes

Length

Width

Unit

Room Dimensions	Area (sq ft)	Area (sq m)	Typical Use
8×10 ft	80	7.43	Small bedroom
10×10 ft	100	9.29	Standard bedroom
10×12 ft	120	11.15	Medium bedroom
12×12 ft	144	13.38	Master bedroom
12×14 ft	168	15.61	Large bedroom
14×16 ft	224	20.81	Living room
15×15 ft	225	20.90	Family room
20×20 ft	400	37.16	Large living room
10×15 ft	150	13.94	Dining room
8×8 ft	64	5.95	Bathroom
5×8 ft	40	3.72	Small bathroom
10×20 ft	200	18.58	Garage (1-car)
20×20 ft	400	37.16	Garage (2-car)