You can follow the guidelines mentioned earlier to determine the appropriate rug size for an 18×20 room. If you aim to fill the entire room with the rug, leaving approximately one to two feet of space between the rug and the walls, you will subtract 2-4 feet from the room dimensions.
What Size Rug for a 18×20 Room?
For an 18×20 living room with two 5-foot walkways on either side of the 20-foot width, a recommended rug size would be approximately 15 feet by 17 feet. This size would allow for a generous rug that covers the room’s central area, accommodating the floating seating arrangement.

Since it might be challenging to find a ready-to-go rug in this specific size, considering customizing a rug from quality broadloom could be a suitable option. Customizing the rug lets you choose the desired dimensions, ensuring it fits the room perfectly.
Subtracting 2 feet from each side of the room, the ideal rug size for an 18×20 room would be approximately 14×16 feet. This size would allow for a balanced and visually appealing look, ensuring that there is sufficient floor coverage while maintaining a border of space around the rug and the walls.
However, if you prefer to layer the rug with a specific piece of furniture, such as a seating area or dining table, you can adjust the rug size accordingly. For instance, if you have an 8-seater dining table in the room, consider a rug size that accommodates the table and chairs while providing enough space for easy movement. In such a case, you could opt for a rug size that is slightly larger than the dimensions of the dining area.
how many square feet in a 18×20 room?
To find the square footage of a room, you need to multiply the length by the room’s width. In the case of an 18×20 room:
Square footage = Length × Width
Square footage = 18 feet × 20 feet
Square footage = 360 square feet
Therefore, a room with dimensions 18×20 has a total area of 360 square feet.
Conclusion
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I am Zuhe Honorata Ejsmont, I have over 8 years of experience working with rugs and carpets, and I enjoy sharing what I’ve learned through my blog. I’m passionate about helping people find the perfect rug to fit their style and needs. I focus on clear, easy-to-understand advice about different materials, designs, and care tips.
Currently, I serve as a co-founder of WhatsMyRugsize.com. When I’m not writing, I love exploring local markets to discover unique rugs and adding new touches to my own home.