Outdoor Rug Size Calculator
A rug that's too big can overhang your patio edge or hide underneath furniture, while one that's too small looks lost in the space. Enter your seating area dimensions below to find a rug size that fits neatly with a bit of border showing.
Find the right size outdoor rug
Enter your available patio or seating area and how much of a border gap you'd like.
Recommended rug dimensions:
3.4m × 2.4m
The closest common outdoor rug size is 2m × 3m, leaving roughly a 30cm gap around the edge of your area.
Recommended products
A few well-reviewed outdoor rugs.
- Polypropylene
- Black
£19.90
Pros
- Weather and UV resistant polypropylene weave
- Holds up well in UK garden conditions
- Easy to hose down and wipe clean
Cons
- Smaller 80x150cm size may not suit larger patios
- Polypropylene
- Grey
£29.99
Pros
- 100% polypropylene flatweave resists mould and UV fading
- Soft underfoot texture despite being a plastic weave
- Suits patios, decking and kitchen utility areas alike
Cons
- Limited stock availability reported by the seller
- Polypropylene
- Black & White
£79.99
Pros
- Bold diamond pattern suits patios, garages and kitchens
- Washable, stain, mould and UV resistant weave
- Large 160x230cm size covers bigger patio areas
Cons
- Pattern shows dust more visibly than plain colours
Frequently asked questions
How much border gap should I leave around an outdoor rug?
A gap of around 30cm on each side is a common starting point, giving a neat framed look without the rug overhanging the edge of the patio or getting caught underfoot near furniture.
Should the rug fit under all my furniture or just the seating area?
Most people find it looks best when at least the front legs of each piece of furniture sit on the rug, which pulls the seating area together visually rather than leaving the rug floating in the middle of the space.
Are outdoor rugs available in custom sizes?
Some retailers offer cut-to-size outdoor rugs, but most stock a handful of standard sizes, so it is usually more practical and cost-effective to round to the nearest common size rather than search for an exact match.
Will an outdoor rug survive UK weather all year round?
Rugs specifically made for outdoor use are woven from weather-resistant materials like polypropylene, but most last longest if you lift and store them during the wettest winter months rather than leaving them out permanently.
How this calculator works
The calculator takes your patio or seating area length and width, then subtracts twice the border gap you specify to get the rug dimensions. For example, a 4m x 3m area with a 30cm border gap gives a rug size of 3.4m x 2.4m. The calculator then matches this to the nearest common outdoor rug size from a list of standard dimensions.
The border gap is the amount of patio or decking you want to show around the edge of the rug. A 30cm gap is a common starting point — it frames the rug nicely without making it look too small. If you want the rug to feel more like a defined 'room' within the space, reduce the border to 15-20cm. If you want the rug to be a subtle accent, increase the border to 40-50cm.
Standard outdoor rug sizes
| Rug size | Patio size (with 30cm border) | Seating capacity | Typical use |
|---|---|---|---|
| 2m x 3m | 2.6m x 3.6m | 2-4 people | Small patio, balcony, apartment |
| 2.4m x 3.4m | 3.0m x 4.0m | 4-6 people | Standard patio, decking |
| 3m x 4m | 3.6m x 4.6m | 6-8 people | Large patio, garden terrace |
| 4m x 5m | 4.6m x 5.6m | 8-10 people | Very large patio, entertaining |
Worked example: A 4m x 3m patio with a 30cm border
A patio 4m long and 3m wide with a 30cm border gap on all sides gives a rug size of 4 - 0.6 = 3.4m long and 3 - 0.6 = 2.4m wide. The nearest common outdoor rug size is 2.4m x 3.4m (or 3m x 4m if you want a bit more coverage). This rug leaves 30cm of patio visible on all sides, framing the seating area nicely.
If you have a 6-seater dining set on the patio, a 3m x 4m rug gives enough coverage for the table and chairs with the border showing around the edges. If you just have a small sofa and coffee table, a 2.4m x 3.4m rug is sufficient. The key is that the rug should be large enough to anchor the furniture without touching the edges of the patio.
Common mistakes when choosing an outdoor rug
- Buying a rug that's too small for the furniture. A rug that only covers part of the seating area looks unfinished and can make the patio feel cluttered. Make sure the rug is large enough for at least the front legs of each piece of furniture to sit on it — this pulls the space together visually.
- Forgetting to account for the patio's shape. A rectangular rug works well on a rectangular patio, but if your patio is L-shaped, circular or has awkward corners, you might need a custom-sized rug or multiple smaller rugs to define different zones. Alternatively, choose a round or oval rug to soften the look of a square patio.
- Choosing a rug that's too large for the space. A rug that touches or overhangs the patio edge looks cramped and can be a tripping hazard. Always leave a border of at least 15-20cm around the edge of the rug so the patio surface is visible and the rug doesn't feel like it's spilling over.
- Not considering drainage and cleaning. An outdoor rug should not block the patio's drainage slope or prevent water from running off. If your patio slopes for drainage, make sure the rug is small enough that water can still flow around it. Also, choose a rug with a low pile (under 1cm) that drains quickly and is easy to hose down.
What to look for when buying an outdoor rug
Material is the most important factor for outdoor rugs. Polypropylene is the most common and durable option — it's UV-resistant, quick-drying, and can be hosed down for cleaning. Polyester is softer underfoot but less durable in direct sunlight. Natural materials like jute, sisal or coir look great but absorb moisture and can mould if left wet, so they're only suitable for covered patios or dry climates.
Weave style affects both look and maintenance. A flatweave rug (no pile) is the most practical for outdoor use — it drains well, is easy to sweep or hose down, and won't trap leaves or debris. A low-pile rug (under 1cm) is softer underfoot but can hold water and takes longer to dry. Avoid high-pile outdoor rugs — they look luxurious but are impractical for UK weather and can become slippery when wet.
Finally, think about colour and pattern. Dark colours hide dirt and stains better than light ones, but they can fade in direct sunlight over time. A patterned rug disguises dirt and wear more effectively than a solid colour, and it can add visual interest to a plain patio. If your patio is in direct sun for most of the day, look for a rug with UV-resistant dyes to prevent fading.
More questions answered
How much border gap should I leave around an outdoor rug?
A gap of around 30cm on each side is a common starting point, giving a neat framed look without the rug overhanging the edge of the patio or getting caught underfoot near furniture.
Should the rug fit under all my furniture or just the seating area?
Most people find it looks best when at least the front legs of each piece of furniture sit on the rug, which pulls the seating area together visually rather than leaving the rug floating in the middle of the space.
Are outdoor rugs available in custom sizes?
Some retailers offer cut-to-size outdoor rugs, but most stock a handful of standard sizes, so it is usually more practical and cost-effective to round to the nearest common size rather than search for an exact match.
Will an outdoor rug survive UK weather all year round?
Rugs specifically made for outdoor use are woven from weather-resistant materials like polypropylene, but most last longest if you lift and store them during the wettest winter months rather than leaving them out permanently.
Can I leave an outdoor rug out in the rain?
Yes — outdoor rugs are designed to get wet, but they should drain quickly and dry fast. A flatweave polypropylene rug will dry within a few hours in good weather. If you have prolonged rain or damp conditions, lift the rug and prop it up to dry on both sides to prevent mould. Avoid leaving a rug in a puddle or in a spot where water pools.
How do I clean an outdoor rug?
Most outdoor rugs can be hosed down with water and left to dry. For tougher stains, use a mild detergent and a soft brush, then rinse thoroughly. Avoid harsh chemicals or bleach, which can damage the fibres and fade the colour. For regular maintenance, sweep or brush the rug to remove leaves, dirt and debris. If the rug is very large, you can also use a pressure washer on a low setting.
Should I use a rug pad under an outdoor rug?
A rug pad isn't essential for outdoor rugs, but it can help prevent slipping on smooth surfaces like tiles or composite decking. If you do use a pad, choose one designed for outdoor use — it should be breathable to allow drainage and quick-drying. Avoid thick, spongy pads that hold water, as they can become mouldy and harbour insects.
What's the difference between polypropylene and polyester outdoor rugs?
Polypropylene is the most durable and UV-resistant option, making it ideal for full-sun patios. It's also the easiest to clean. Polyester is softer and has a more luxurious feel, but it fades faster in direct sunlight and is less hard-wearing. For a patio that gets full sun, choose polypropylene. For a covered patio or a spot that's mostly in shade, polyester is a good compromise.