Rug Size Calculator
Find the perfect rug size for any room. Enter dimensions, choose a shape, and get custom rug area, cost, and closest standard size with our free calculator.
About This Calculator
Our Rug Size Calculator helps you find the perfect rug dimensions for any room in your home. Whether you are furnishing a living room, bedroom, dining room, hallway, or outdoor patio, choosing the right rug size transforms the look and feel of your space. A well-sized rug anchors furniture, defines zones in open-plan layouts, and adds warmth underfoot.
The calculator supports six rug shapes: rectangle, square, runner, circle, oval, and octagon. For rectangle and square rugs, the formula is Rug Length = Room Length - (Gap × 2) and Rug Width = Room Width - (Gap × 2), with area calculated as Length × Width. Circle rug area uses π × (diameter / 2)², oval rug area uses π × (length / 2) × (width / 2), and octagon rug area uses side² × 4.8284 where side = shorter room dimension × 0.4142. The runner rug width is capped at 3 ft.
The calculator automatically suggests the closest matching standard rug size from a comprehensive database of industry-standard dimensions, so you can buy off-the-shelf rather than ordering custom. You can also enter a cost per square foot to estimate the total rug price, making budgeting easier.
Regional Notes
India: Room sizes vary widely. Standard apartment living rooms are 12-16 ft, making 8×10 or 9×12 ft rugs ideal. Many Indian homes use dhurries and cotton rugs. Measure in feet or metres — enter feet in the calculator. Rug prices range from ₹50-200 per sq ft for dhurries to ₹500+ per sq ft for hand-knotted silk rugs.
United States: Standard room sizes follow imperial measurements. Typical living rooms of 14×18 ft work well with 10×14 ft rugs. Use a 1.5-2 ft gap. Cost range is $2-10 per sq ft for synthetic rugs and $10-50+ per sq ft for wool or natural fibre rugs.
United Kingdom: Rooms are often smaller. A 10×12 ft living room pairs well with a 7×9 ft rug. Leave a 1-1.5 ft gap. Rug costs range from £5-15 per sq ft for machine-made to £20-80+ per sq ft for hand-knotted wool or silk rugs.
Frequently Asked Questions
How do I determine the right rug size for my room?
Measure your room length and width in feet. Subtract the bare floor gap (typically 1.5 to 2 feet) from each side to get the ideal rug dimensions. For a 12 ft x 14 ft room with a 1.5 ft gap, the rug should be 9 ft x 11 ft, giving a rug area of approximately 99 sq ft. Consider leaving at least 18 inches of bare floor around the rug for a balanced look.
What are standard rug sizes available in the market?
Standard rectangle rug sizes include 5x3, 6x4, 8x5, 9x6, 10x8, 12x9, 14x10, 15x12, and 18x12 feet. Square rugs come in 4x4, 6x6, 8x8, 10x10, and 12x12 feet. Runner rugs are available in 6x2, 8x2, 10x2, and wider options up to 15x3 feet. Circle rugs come in diameters of 4, 6, 8, 10, and 12 feet.
How much bare floor should I leave around a rug?
The standard recommendation is to leave 1.5 to 2 feet of bare floor on all sides of the rug. In a small room under 10 ft, use a 1 ft gap. In a large room over 15 ft, a 2 to 3 ft gap works well. For runners in hallways, leave 6 to 12 inches on each side. In dining rooms, leave at least 2.5 to 3 ft so chairs can pull out without catching the rug edge.
What is the best rug shape for a living room?
Rectangle rugs are the most popular choice for living rooms as they naturally align with furniture layouts and room dimensions. Square rugs work well in square rooms or under square coffee tables. Circle rugs soften angular spaces and work great in corners, reading nooks, or under round dining tables. Oval rugs are ideal for long narrow rooms or under oval dining tables.
How do I choose a rug size for under a bed?
For a queen bed (60 x 80 inches), use an 8x10 ft rug extending 18-24 inches beyond the bed sides and foot. For a king bed (76 x 80 inches), use a 9x12 ft rug. For a twin or full bed, a 5x8 ft or 6x9 ft rug works well. Center the rug under the bed, leaving 12-18 inches of bare floor on the sides and 18-24 inches at the foot. In the US and UK, rug runners along each side of the bed are a popular alternative.
Can I use this calculator for outdoor rugs?
Yes, this rug size calculator works for both indoor and outdoor rugs. For outdoor rugs on patios or decks, leave at least 6 inches of bare floor around the edge. For outdoor dining, consider a rug large enough to accommodate the table and all chairs even when pulled out. Standard outdoor rug materials include polypropylene, recycled plastic, and treated cotton.
How do I calculate rug pad size?
Rug pad size should be 1 to 2 inches smaller than the rug on all sides. For a 9x12 ft rug, the pad should be approximately 8'10" x 11'10". This prevents the pad from being visible while still providing cushioning and slip resistance. For thin rugs or rugs on hardwood floors, use a thicker pad. For rugs on carpet, use a thin non-slip pad.
What is the best way to measure a room for a rug?
Use a tape measure to measure the room length and width at the longest and widest points. Account for any permanent fixtures like fireplaces, built-in cabinets, or radiators by measuring around them. For irregularly shaped rooms, divide the space into rectangles, measure each section, and use the largest clear floor area for rug placement. Always measure twice to ensure accuracy before ordering a custom rug.