20x30 in square feet, square yards and square meters
A studio apartment or a two-car garage with a workshop is about this size. The area is length times width: 20 × 30 = 600 sq ft. Measure to the walls at the longest point, and add closets and alcoves you will floor.
| Unit | This room |
|---|---|
| Square feet | 600 sq ft |
| Square yards | 66.67 sq yd |
| Square meters | 55.74 sq m |
| Perimeter (around the walls) | 100 ft |
| Acres | 0.01377 acres |
What to buy for 600 sq ft
| Material | Amount |
|---|---|
| Flooring (10% waste, 20 sq ft boxes) | 660 sq ft, 33 boxes |
| Carpet off a 12 ft roll (before trimming) | 80.0 sq yd, 2 pieces |
| 12 × 12 in tiles (10% waste) | 660 tiles |
| Baseboard (full perimeter, before doorways) | 100 ft |
Flooring with different waste allowances
Straight layouts need about 5 to 7%, diagonal layouts 10%, and herringbone or patterns 15%.
| Waste | Flooring to buy | Boxes of 20 sq ft |
|---|---|---|
| 5% waste | 630 sq ft | 32 |
| 10% waste | 660 sq ft | 33 |
| 15% waste | 690 sq ft | 35 |
Use the square footage calculator for L-shaped rooms, circles and triangles, the carpet calculator for the roll layout with trimming, or the flooring calculator for a full flooring estimate.
20 × 30: 600 square feet of garage, shop or studio apartment
A 20 × 30 footprint is 600 sq ft, the size of a small studio apartment, a two-car garage with a workshop behind the cars, or a modest pole building. It is 100 ft around and 36.1 ft on the diagonal. In land terms it is 1.38% of an acre.
The slab is the big number: at 4 in with a small overage it is about 8.1 cubic yards, which is most of a ready-mix truck, and many garage floors are poured thicker. Inside, 8 ft walls come to 800 sq ft, and two coats on 749 sq ft use 4.28 gallons, so buy pails, not cans. Finished as living space, the floor takes 33 boxes of plank, about 660 sq ft, and a job this size is usually split into rooms that each need their own measurements.
Want to change anything else? The calculator above is the full Square Footage Calculator: edit any number and the results update instantly.
Frequently asked questions
How many square feet is a 20x30 room?
600 square feet (20 ft × 30 ft). That is 66.67 square yards or 55.74 square meters.
How many square feet of flooring do I need for a 20x30 room?
The floor is 600 sq ft, so buy about 660 sq ft with 10% for cuts and waste. That is 33 boxes at 20 sq ft a box.
How much carpet is a 20x30 room?
66.67 square yards of floor. Carpet comes off a 12 ft wide roll, so you buy whole strips: here 2 pieces 12 ft wide and 30 ft long, with a seam, which is 720 sq ft (80.0 sq yd) of carpet for a 600 sq ft floor, plus a few inches a strip for trimming.
Related sizes and guides
Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.