Rug Size Calculator
Free Rug size tool for home economics. Enter your details to get instant, tailored results and guidance. Free to use with no signup required.
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
Ideal Rug Size = Room Dimension - (2 x Floor Exposure)
Where Room Dimension is the length or width in feet, and Floor Exposure is the desired bare floor border (typically 12-24 inches, converted to feet). The calculator then matches the ideal dimensions to the closest available standard rug size.
Worked Examples
Example 1: Living Room Rug Size Selection
Problem:A 15ft x 12ft living room with standard 18-inch floor exposure desired. What rectangular rug size is best?
Solution:Floor exposure = 18 in = 1.5 ft per side\nIdeal rug length = 15 - (2 x 1.5) = 12.0 ft\nIdeal rug width = 12 - (2 x 1.5) = 9.0 ft\nClosest standard size = 9 x 12\nRug area = 108 sq ft\nRoom area = 180 sq ft\nCoverage = 108/180 = 60%\nRug pad size = 8 x 11 (1 inch smaller each side)
Result:Recommended: 9 x 12 rug | 60% coverage | Pad: 8 x 11
Example 2: Small Bedroom Rug for Queen Bed
Problem:A 12ft x 10ft bedroom needs a rug under a queen bed with 12-inch floor exposure.
Solution:Floor exposure = 12 in = 1.0 ft per side\nIdeal rug length = 12 - (2 x 1.0) = 10.0 ft\nIdeal rug width = 10 - (2 x 1.0) = 8.0 ft\nClosest standard size = 8 x 10\nRug area = 80 sq ft\nRoom area = 120 sq ft\nCoverage = 80/120 = 66.7%
Result:Recommended: 8 x 10 rug | 66.7% coverage | Pad: 7 x 9
Frequently Asked Questions
What size rug do I need for my living room?
The ideal living room rug should be large enough that all main furniture pieces sit on the rug or at least have their front legs on it. For most living rooms between 12 by 15 feet and 15 by 20 feet, an 8 by 10 or 9 by 12 rug is the standard recommendation. The general rule is to leave 12 to 24 inches of bare floor visible between the rug edge and the walls on all sides. For open-concept living rooms, the rug should define the seating area specifically rather than trying to cover the entire space. If your sofa and chairs are arranged in a U-shape or L-shape, ensure the rug extends under the front legs of all seating pieces to create visual cohesion and prevent the furniture grouping from looking disconnected.
How much floor should show around a rug?
The industry standard recommendation is 12 to 24 inches of bare floor showing between the rug edge and the walls. In smaller rooms (under 10 by 12 feet), 8 to 12 inches of exposure works well to prevent the rug from making the room feel cramped. In larger rooms (over 15 by 18 feet), 18 to 24 inches of floor exposure creates an elegant frame effect. For hallway runners, leave 4 to 6 inches on each side. The exposed floor border should be consistent on all sides for a balanced, intentional look. If the room has beautiful hardwood or tile flooring, you might prefer more exposure (24 inches) to showcase the floor, while wall-to-wall carpet peeking out around an area rug typically looks best with minimal 6 to 8 inch exposure.
What rug size works best under a dining table?
A dining room rug should extend at least 24 to 30 inches beyond the table edge on all sides to accommodate chairs being pulled in and out without catching on the rug edge. For a standard 6-person rectangular dining table (approximately 36 by 72 inches), an 8 by 10 rug provides adequate coverage. For an 8-person table (approximately 42 by 96 inches), a 9 by 12 or 10 by 14 rug is ideal. Round dining tables need round or square rugs with at least 24 inches of rug beyond the table edge in every direction. A 48-inch round table needs at least an 8-foot round rug. The most common mistake is choosing a rug that is too small, resulting in chair legs slipping off the rug edge when diners push back from the table.
Should I put a rug pad under my area rug and what size?
Yes, a rug pad is highly recommended under every area rug for multiple important reasons. Rug pads prevent slipping and bunching which reduces tripping hazards, extend the life of both the rug and the floor underneath, provide additional cushioning for comfort underfoot, and prevent dye transfer from the rug to light-colored flooring. The rug pad should be 1 inch smaller than the rug on all sides, so a pad for an 8 by 10 rug should be approximately 7 feet 10 inches by 9 feet 10 inches. Choose the pad material based on your floor type: felt pads work best on hardwood, rubber pads grip tile and stone well, and combination felt-rubber pads offer the most versatility. Avoid PVC-based pads on hardwood as they can cause discoloration.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy