How Many Square Feet Is a 10x20 Room?
A 10 ft × 20 ft room equals 200 square feet. Use the calculator below to double-check or customize with waste and cost.
Last updated:Tip: If you only have the diameter, divide by 2 to get the radius.
L-shape = two rectangles sharing a corner.
Add one row per rectangle and we'll sum them.
Key Measurements for a 10x20 Room
| Metric | Value |
|---|---|
| Floor area | 200 sq ft |
| Floor area (m²) | 18.58 m² |
| Floor area (sq yd) | 22.22 sq yd |
| Perimeter | 60 ft |
| Wall area (8 ft ceiling) | 480 sq ft |
| Wall area (9 ft ceiling) | 540 sq ft |
| Wall area (10 ft ceiling) | 600 sq ft |
Common Uses for a 10x20 Space
- garage bay
- RV pad
At 200 sq ft, this falls in the medium category — common for primary bedrooms, family rooms, or dining areas.
How Much Flooring Will You Need?
For a 10' × 20' room, buy enough flooring to cover 200 sq ft plus a waste allowance:
| Flooring Type | Waste % | Buy This Much |
|---|---|---|
| Laminate / LVP (plank) | 10% | 221 sq ft |
| Hardwood | 10% | 221 sq ft |
| Ceramic tile (straight) | 10% | 221 sq ft |
| Ceramic tile (diagonal) | 15% | 230 sq ft |
| Carpet | 10% | 221 sq ft (25 sq yd) |
Need an exact estimate? Use our Flooring Calculator for plank count, or the Tile Calculator for boxes of tile.
How Much Paint for a 10x20 Room?
With 8 ft ceilings you'll paint about 480 sq ft of wall. A gallon covers ~350 sq ft, so you'll need 2 gallons per coat. Plan on two coats for a color change.
Detailed breakdown on our Paint Calculator.
Is a 10x20 Room Big?
This is a large bedroom or medium living room. It comfortably fits a king bed with additional furniture, or a sofa set with a coffee table.
How Much Does It Cost to Build a 10x20 Room?
At typical US rates of $150–$300 per sq ft for new construction, a 10x20 addition would cost roughly $30,000–$60,000. For remodels:
- Basic flooring replacement: $600–$2,000
- Mid-range remodel: $10,000–$20,000
- Full gut renovation: $20,000–$50,000
Refine with our Cost per Square Foot Calculator.
Frequently Asked Questions
How many square feet is 10x20?
10 × 20 = 200 square feet.
How many square meters is 10x20?
18.58 m².
How many tiles will fit in a 10x20 room?
Depends on tile size. 12"×12" tiles = 221 tiles (with 10% waste). See our Tile Calculator for 6", 18", and 24" sizes.
How much carpet do I need for a 10x20 room?
22.22 sq yd minimum, or 24.44 sq yd with 10% waste for cuts and seams.