If you're making or recovering patio cushions, one of the first questions you'll need to answer is how much fabric do I need for outdoor chair cushions?
Quick answer: A typical outdoor chair seat cushion usually requires about 3/4 to 1 yard of 54-inch-wide outdoor fabric. A matching seat-and-back cushion set will often require approximately 1.5 to 2 yards per chair. Large deep-seat patio chair cushions may require around 2 to 2.5 yards per chair.
The exact amount depends on the cushion's width, depth, thickness, construction, and whether you're making a seat only or both a seat and back cushion. Fabric width, pattern repeat, stripes, piping, and the number of cushions you're making can also change the total.
The good news is that outdoor chair cushions are relatively easy to calculate once you understand how the pieces fit across a 54-inch-wide roll.
Outdoor Chair Cushion Fabric Yardage Chart
| Outdoor Cushion Type | Starting Fabric Estimate |
|---|---|
| Small Seat Cushion – 18" × 18" | 3/4 yard |
| Standard Seat Cushion – 20" × 20" | 3/4–1 yard |
| Large Seat Cushion – 22" × 22" | 1 yard |
| Deep Seat Cushion – 24" × 24" | 1–1.25 yards |
| Standard Seat + Back Cushion Set | 1.5–2 yards |
| Large Deep-Seat + Back Cushion Set | 2–2.5 yards |
These are practical starting estimates based on approximately 54-inch-wide outdoor upholstery fabric and typical removable cushions. Actual yardage depends on cushion thickness, construction, fabric direction, pattern repeat, piping, and cutting layout.
For outdoor furniture projects, browse our Sunbrella Fabric by the Yard for outdoor upholstery fabric suitable for patio chairs, cushions, benches, sofas, chaise lounges, and other outdoor projects.
How to Measure an Outdoor Chair Cushion
For a removable seat cushion, start with three basic measurements:
- Width: Measure the cushion from left to right.
- Depth: Measure from the front edge to the back edge.
- Thickness: Measure from the top surface to the bottom surface.
If you're also recovering the back cushion, measure its:
- Width
- Height
- Thickness
Measure the actual cushion whenever possible rather than measuring only the chair frame.
Finished Cushion Size vs. Cut Size
One of the most important things to remember is that the finished cushion dimensions are not necessarily the dimensions of the fabric pieces you cut.
For example, suppose you're making a 20" × 20" finished cushion.
If you're using 1/2-inch seam allowances, a basic top panel would be approximately:
21" × 21"
The same applies to the bottom panel.
A boxed cushion also requires strips for the sides, commonly called boxing.
What Fabric Pieces Are Needed for a Boxed Outdoor Cushion?
A typical removable boxed patio cushion requires:
- One top panel
- One bottom panel
- Front boxing
- Back or zipper panel
- Left-side boxing
- Right-side boxing
- Piping or welt, if used
This is why simply measuring the top of the cushion isn't enough to determine total fabric yardage.
How Cushion Thickness Affects Fabric Yardage
The thicker the cushion, the wider the boxing strips need to be.
For example, a 4-inch-thick cushion using approximately 1/2-inch seams would typically need boxing strips around 5 inches wide.
A 6-inch-thick deep-seat cushion would require boxing strips around 7 inches wide.
On one cushion this difference may seem small, but across four or six patio chairs, the additional boxing material can noticeably affect the total yardage.
Why 54-Inch Fabric Width Matters
Most upholstery and outdoor fabrics are sold by the linear yard, so fabric width is just as important as total cushion size.
The estimates in this guide assume approximately 54-inch-wide outdoor fabric.
Let's look at a 20" × 20" finished cushion.
With 1/2-inch seams, the top and bottom panels are approximately:
21" × 21"
Two 21-inch panels fit easily across a 54-inch-wide roll:
21" + 21" = 42"
That means the top and bottom panels can potentially be cut beside one another instead of one after another down the roll.
This can save a significant amount of fabric.
How Much Fabric for an 18" × 18" Outdoor Chair Cushion?
An 18" × 18" finished seat cushion will typically require fabric panels approximately 19" × 19" when using 1/2-inch seam allowances.
Two panels side by side require only:
19" + 19" = 38"
That fits comfortably across 54-inch-wide fabric.
For one straightforward boxed cushion, approximately 3/4 yard is a practical starting purchase amount and generally provides room for the top, bottom, boxing, and normal construction allowances.
How Much Fabric for a 20" × 20" Outdoor Chair Cushion?
A 20" × 20" finished cushion requires top and bottom panels approximately 21" × 21" with 1/2-inch seam allowances.
Because both panels can fit side by side across 54-inch-wide fabric, the main faces use only about 21 inches of roll length.
Once boxing, zipper construction, piping, trimming, and layout are included, approximately 3/4 to 1 yard is a practical starting amount for one cushion.
How Much Fabric for a 22" × 22" Outdoor Chair Cushion?
A 22" × 22" finished cushion requires approximately 23" × 23" top and bottom panels.
Two panels require:
23" + 23" = 46"
They can still fit beside each other across many 54-inch-wide outdoor fabrics.
Approximately 1 yard is a practical starting amount for one standard boxed cushion, depending on thickness and finishing details.
How Much Fabric for a 24" × 24" Deep-Seat Cushion?
A 24" × 24" finished cushion requires approximately 25" × 25" panels when using 1/2-inch seam allowances.
Two panels require:
25" + 25" = 50"
This may fit across nominal 54-inch-wide fabric, but the layout is getting much tighter.
Remember that the full advertised width may not be usable because of selvages or edge finishing.
A thick 24-inch deep-seat cushion also requires wider boxing strips.
For one 24" × 24" boxed cushion, approximately 1 to 1.25 yards is a safer starting estimate.
When Two Cushion Panels Don't Fit Across the Fabric
This is where outdoor cushion yardage can change quickly.
Suppose you have a 26" × 26" finished cushion.
With 1/2-inch seam allowances, each panel becomes approximately:
27" × 27"
Two panels would require:
27" + 27" = 54"
Although that equals the nominal width of 54-inch fabric, it is usually too close to assume both panels will fit safely because of selvages and usable-width limitations.
If the panels must instead be cut one after another down the roll, the amount of fabric required increases significantly.
Always check usable fabric width before planning a cutting layout this tight.
How Much Fabric for an Outdoor Chair Seat and Back Cushion?
Many patio chairs use two separate cushions: one seat cushion and one back cushion.
A standard seat-and-back set will often require approximately 1.5 to 2 yards of 54-inch-wide outdoor fabric.
A large deep-seat chair with thick seat and back cushions may require approximately 2 to 2.5 yards.
The best method is to calculate the seat and back separately and then determine whether their panels can share the fabric width.
Worked Example: 22" Seat + 22" Back Cushion
Suppose an outdoor chair has:
- 22" × 22" × 4" seat cushion
- 22" × 20" × 4" back cushion
- Boxed construction
- Solid 54-inch-wide outdoor fabric
With 1/2-inch seams, the seat faces are approximately 23" × 23".
The back cushion faces are approximately 23" × 21".
Because these pieces are relatively narrow, several panels can potentially be arranged efficiently across the 54-inch width.
Once boxing, zipper panels, piping, and cutting allowances are included, approximately 1.5 to 2 yards is a reasonable starting purchase for the complete chair set.
How Much Fabric for Deep-Seat Patio Chair Cushions?
Deep-seat patio furniture typically uses larger and thicker cushions than outdoor dining chairs.
A deep-seat chair might have:
- 24" × 24" seat cushion
- 24" × 22" back cushion
- 5" or 6" cushion thickness
The larger faces and wider boxing increase material use.
For a complete deep-seat chair cushion set, approximately 2 to 2.5 yards of 54-inch-wide outdoor fabric is a practical starting range.
Large patterns, stripes, unusually thick cushions, or cushions wider than approximately 24 inches may require more.
Boxed vs. Knife-Edge Outdoor Chair Cushions
Cushion construction also affects yardage.
Boxed cushions have separate side panels between the top and bottom faces. These side panels create the cushion's thickness and require additional fabric.
Knife-edge cushions generally have a top and bottom panel sewn directly together around the perimeter without a separate boxing strip.
Because knife-edge cushions don't require boxing, they may use somewhat less fabric than boxed cushions of the same face dimensions.
However, piping, ties, pattern matching, and other details still need to be included.
What About Waterfall Cushions?
A waterfall cushion uses one continuous piece of fabric that wraps from one surface around an edge to another surface rather than using separate panels on every side.
This construction can reduce the number of seams and create a cleaner appearance.
However, it changes the cutting layout because a longer continuous piece is required.
Don't use the standard boxed-cushion calculation without adjusting for the continuous waterfall panel.
How Much Fabric for Four Outdoor Chair Cushions?
Don't automatically multiply the one-cushion estimate by four.
When you're making multiple identical cushions, you can often arrange pieces more efficiently across the fabric width and down the roll.
For example, four 20" × 20" cushions require eight approximately 21" × 21" face panels.
Two panels can fit across a 54-inch roll, so the eight faces can potentially be arranged in four rows.
Four rows × 21 inches = approximately:
84 inches, or 2.33 yards
That's for the eight main faces before adding boxing, piping, zipper panels, trimming, and other allowances.
Depending on cushion thickness and construction, a practical total for four standard cushions may be approximately 3 to 4 yards.
How Much Fabric for Six Outdoor Chair Cushions?
Using the same 20" × 20" example, six cushions require twelve main face panels.
With two 21-inch panels fitting across the width, those faces require six rows:
6 × 21" = 126"
126 inches equals:
3.5 yards
Again, that's only the main faces.
After boxing, zipper panels, piping, and normal allowances are included, approximately 4.5 to 5.5 yards may be a practical starting range for six standard cushions.
Creating an actual cutting layout is the safest method when purchasing fabric for an entire patio dining set.
How Much Sunbrella Fabric Do I Need for Outdoor Chair Cushions?
The same basic yardage calculations apply when you're using Sunbrella outdoor upholstery fabric.
Start by measuring the cushion width, depth, and thickness, then calculate the top, bottom, boxing, zipper panels, and piping.
The important step is checking the width and pattern specifications of the particular fabric you're purchasing before finalizing the amount.
Browse our Sunbrella Fabric by the Yard for outdoor chair cushions, patio furniture, benches, sofas, chaise lounges, and other outdoor upholstery projects.
Do Stripes Require More Fabric?
They can.
Striped outdoor fabric usually needs to run consistently across all cushions.
If one cushion has vertical stripes while another has horizontal stripes, the finished patio set can look mismatched.
A directional stripe may prevent you from rotating pieces to take advantage of unused areas of the fabric.
If you're recovering several matching chairs, also consider whether you want the stripe centered in the same position on every cushion.
That can require additional material.
Large Pattern Repeats Can Increase Yardage
Large florals, geometrics, medallions, and other repeating designs can also increase the amount of fabric required.
You may want the same portion of the pattern centered on every chair cushion.
For a coordinated patio set, this can make a noticeable visual difference.
Don't simply add a generic percentage for patterned fabric. Check the actual horizontal and vertical repeat and plan where each cushion panel will begin.
Does Piping Require Extra Fabric?
Yes. Piping or welt should be included in your cutting plan.
Consider a 22" × 22" cushion.
Its finished perimeter is approximately:
22 + 22 + 22 + 22 = 88 inches
If piping is used around both the top and bottom edges, that's approximately:
176 inches of finished piping per cushion
Across four chairs, that becomes approximately:
704 inches, or nearly 59 feet of piping
Additional length is needed for joining and finishing.
Don't assume all piping strips can be cut from scraps when estimating a larger patio set.
Don't Forget Cushion Ties
Outdoor chair cushions often have ties or straps that secure them to the furniture.
If you're making ties from the same outdoor fabric, include them in your cutting layout.
The amount needed for one chair may be small, but multiple chairs can require many strips.
Worked Example: Four 20" × 20" Patio Chair Cushions
Suppose you're recovering four outdoor dining-chair cushions measuring:
20" wide × 20" deep × 3" thick
Each cushion requires approximately 21" × 21" top and bottom panels when using 1/2-inch seams.
There are eight total face panels.
Two can fit across a 54-inch-wide roll, producing four rows of approximately 21 inches.
The faces therefore consume approximately:
84 inches = 2.33 yards
You still need material for boxing, zipper panels, piping or welt, ties, trimming, and construction allowances.
For a straightforward solid or small non-directional fabric, approximately 3 to 4 yards is a practical starting purchase range for the four cushions.
Worked Example: Deep-Seat Chair with Seat and Back
Now consider one deep-seat patio chair with:
- 24" × 24" × 5" seat cushion
- 24" × 22" × 5" back cushion
- Boxed construction
- Piping
- Zippered covers
- 54-inch-wide solid outdoor fabric
The cushion faces are relatively large, and the 5-inch thickness requires wide boxing strips.
A practical starting purchase would be approximately 2 to 2.5 yards.
If you're using a large repeat or directional pattern, create the cutting layout before ordering because the requirement may be higher.
Should I Buy Extra Outdoor Fabric?
It's usually better not to order exactly to the mathematical minimum.
Additional fabric gives you room for:
- Seam allowances
- Boxing
- Zipper panels
- Piping
- Cushion ties
- Pattern positioning
- Pattern matching
- Directional layouts
- Trimming
- Cutting mistakes
- Future repairs
This is particularly important with overstock, closeout, and discontinued outdoor fabrics that may not be available again later.
Can I Use Outdoor Fabric Remnants for Chair Cushions?
Yes. Outdoor chair cushions can be excellent projects for appropriately sized remnants.
Remnants can work particularly well for:
- Single chair cushions
- Small sets of matching cushions
- Seat-only cushions
- Back cushions
- Accent pillows
- Contrasting cushion boxing
- Repairs
The key is checking the actual remnant dimensions.
A remnant may have enough total yardage but still be too narrow or too short for the required cushion panels.
Best Fabric for Outdoor Chair Cushions
Outdoor chair cushions need fabric designed for the conditions in which they'll be used.
Depending on the application, desirable characteristics can include:
- Resistance to fading from sunlight
- Durability for repeated sitting
- Resistance to moisture
- Easy cleaning
- Good dimensional stability
- Comfortable hand for seating
Solution-dyed acrylic outdoor upholstery fabrics such as Sunbrella are popular choices for patio cushions because they combine outdoor performance with the look and feel of woven upholstery fabric.
Shop our Sunbrella Fabric by the Yard for outdoor chair cushions and patio upholstery projects.
Common Outdoor Chair Cushion Yardage Mistakes
- Measuring only the top. Boxed cushions also require a bottom and side boxing.
- Using finished dimensions as cut dimensions. Remember to allow for seams.
- Ignoring cushion thickness. Thick cushions require wider boxing.
- Assuming the entire 54-inch width is usable. Selvages can reduce usable width.
- Multiplying one-cushion yardage by the number of chairs. Multiple cushions can often be nested more efficiently.
- Forgetting piping. A set of patio chairs can require many feet of welt.
- Forgetting ties or straps. Include them if they're made from the same fabric.
- Ignoring pattern repeat. Matching several chairs may require additional fabric.
- Rotating directional fabric. Stripes and one-way patterns need consistent orientation.
- Ordering the absolute minimum. A little extra can be valuable for future repairs.
Related Fabric Yardage Guides
Planning more cushion or upholstery projects? These Fabric & Supply guides can help:
- How Much Upholstery Fabric Do I Need? Complete Yardage Guide – Our main furniture upholstery yardage guide.
- How Much Fabric Do I Need for Boat Cushions? – Includes marine seating, bench cushions, boxed cushions, and irregular bow cushions.
- How Much Fabric Do I Need for a Window Seat Cushion? – Detailed calculations for long boxed cushions.
- How Much Fabric Do I Need to Reupholster a Bench Seat? – Useful for rectangular upholstered seating projects.
- How Much Fabric Do I Need for a Pillow? – Calculate yardage for outdoor throw pillows and decorative cushions.
As we add the rest of the outdoor series, this guide will also link directly to our upcoming Outdoor Sofa Cushion, Outdoor Chaise Cushion, and Outdoor Bench Cushion yardage guides.
Frequently Asked Questions About Outdoor Chair Cushion Fabric
How much fabric do I need for one outdoor chair cushion?
A typical outdoor seat cushion will often require approximately 3/4 to 1 yard of 54-inch-wide outdoor fabric. Large or deep-seat cushions may require approximately 1 to 1.25 yards or more.
How much fabric do I need for an outdoor chair seat and back cushion?
A standard seat-and-back cushion set will often require approximately 1.5 to 2 yards. A large deep-seat chair with thick seat and back cushions may require approximately 2 to 2.5 yards.
How much fabric do I need for four patio chair cushions?
Four standard 20-inch boxed seat cushions may require approximately 3 to 4 yards of 54-inch-wide fabric, depending on cushion thickness, piping, pattern repeat, and the cutting layout.
How much fabric do I need for six patio chair cushions?
Six standard 20-inch boxed seat cushions may require approximately 4.5 to 5.5 yards of 54-inch-wide fabric. Creating a cutting layout before ordering is recommended.
How much Sunbrella fabric do I need for patio chair cushions?
The amount depends on the cushion dimensions and the width and pattern of the specific Sunbrella fabric. A typical seat cushion may require around 3/4 to 1 yard, while a seat-and-back set may require approximately 1.5 to 2 yards.
Do boxed cushions require more fabric than knife-edge cushions?
Usually. Boxed cushions require separate side panels around the cushion thickness, while knife-edge cushions generally sew the top and bottom panels directly together.
Does cushion thickness affect how much fabric I need?
Yes. Thicker cushions require wider boxing strips. This can noticeably increase total fabric requirements when making several matching patio cushions.
Does striped outdoor fabric require more yardage?
It can. Stripes limit how cushion pieces can be rotated and may need to be centered or aligned consistently across multiple chairs, which can increase the required yardage.
Can I use a fabric remnant for an outdoor chair cushion?
Yes. Outdoor chair cushions can be excellent remnant projects as long as the remnant has enough continuous width and length for the cushion panels and other required pieces.
Shop Sunbrella Fabric for Outdoor Chair Cushions
Once you've measured your cushions and determined how the pieces will fit across the fabric width, you're ready to choose your outdoor fabric.
Browse our Sunbrella Fabric by the Yard for patio chair cushions, deep-seat furniture, outdoor sofas, chaise lounges, benches, pillows, and other outdoor upholstery projects.
Before ordering, measure every cushion individually and account for the top, bottom, boxing, zipper panels, piping, ties, seam allowances, usable fabric width, pattern repeat, and fabric direction.
