Rug Size Calculator: What Size Rug Do I Need?

How the Rug Size Calculator Picks a Size

The calculator starts with your room dimensions and subtracts a border of bare floor on every side. In most rooms it leaves 12 to 18 inches (30 to 45 cm) between the rug and the walls; in small rooms it allows 8 to 12 inches (20 to 30 cm). That gives the largest rug the room can comfortably hold. It then applies the furniture rule for your room type and layout, and rounds to the closest standard size that satisfies both. Standard sizes are far cheaper and easier to find than custom ones, so the tool only recommends sizes you can actually buy.

Living Room Rug Layouts

The layout you pick changes the recommendation more than anything else:

• All legs on: every piece of seating sits fully on the rug. This looks the most luxurious and works in larger rooms, often calling for a 9x12 or bigger.
• Front legs on: the front legs of the sofa and chairs rest on the rug by at least 6 to 8 inches, with back legs on the floor. This is the most common apartment solution, usually an 8x10, and it visually connects the seating group.
• Floating: the rug sits under the coffee table only, with no furniture on it. It suits very small rooms, but the rug should still be wider than the coffee table and nearly as long as the sofa, or it looks like an afterthought.

For more ways to anchor your seating, see our apartment living room ideas.

Dining Room Rug Rules

Dining rugs follow one firm rule: the rug should extend at least 24 inches (60 cm) beyond every edge of the table so chairs stay on the rug when pulled out. Add 48 inches to the table length and width to get the minimum rug size. A 36 by 60 inch table needs at least 84 by 108 inches, which puts you at an 8x10 minimum, with a 9x12 giving more breathing room. A low, flat-weave or short-pile rug makes chairs easier to slide and crumbs easier to clean.

Bedroom Rug Sizes by Bed

In a bedroom, the goal is for your feet to land on something soft. The rug should extend 18 to 24 inches (45 to 60 cm) beyond each side of the bed. Place it horizontally and tuck it under the lower two-thirds of the bed, stopping a few inches in front of the nightstands.

If your bedroom is too narrow for the full size, a pair of runners or 3x5 rugs on either side of the bed is a smart alternative. Our apartment bedroom ideas include more small-room layouts.

Entryways and Hallways

For a hallway, choose a runner that leaves roughly 4 to 6 inches of floor on each side and 6 to 12 inches at each end. The calculator picks between 2.5x8, 2.5x10, and 2.5x12 runners based on your hall length. In a square entry, a 3x5 or 4x6 should clear the swing of the door.

Choosing Material and Pile

Once you know the size, pick a material that matches the room's traffic. Wool is durable, naturally stain-resistant, and looks expensive for years. Jute and sisal bring texture but are rough underfoot and hard to clean, so keep them out of dining areas. Low-pile and flat-weave rugs suit dining rooms, entries, and rooms with doors that swing over them, while plush pile belongs in bedrooms. Always use a rug pad to stop slipping and protect rental floors. For texture ideas, read our guide to the Japandi rug, and see why proper rug sizing is one of the key tips in how to make your apartment look expensive.