How to bind a quilt

To bind a quilt, cut 2 1/2" strips across the width of fabric and join them with diagonal seams into one long strip. Press the strip in half lengthwise, sew it to the quilt edges with a 1/4" seam, miter each corner, join the ends with an overlapping diagonal seam, and fold to finish by hand or machine.

This guide uses double-fold binding, also called French binding: the strip is folded in half before it is sewn on, so two layers of fabric wrap the quilt edge. Single-fold binding uses one layer and wears through sooner, which is why double-fold is the usual choice for quilts that get used and washed.

Quilt binding at a glance

The table shows binding requirements for five standard quilt sizes, based on 2 1/2" strips from 42" usable cotton width, 12" added to the perimeter, and yardage rounded up to the next 1/8 yard.

Swipe the table sideways to see every column.

The binding needed column adds 12" to the perimeter for turning corners and joining ends. Strip counts use 42" usable cotton width, allowing for diagonal joins. For custom quilt dimensions, use the Quilt Binding Calculator.

Choosing your binding strip width

Binding strips are usually cut 2 1/4" or 2 1/2" wide. Which one to use depends on how thick your batting is and how accurately you sew a 1/4" seam.

Strips cut at 2 1/2" are the standard choice. They wrap comfortably around medium- and high-loft batting without compressing the edge, covering machine stitches on the back with plenty of leeway.

Strips cut at 2 1/4" make a narrower, flatter binding and suit thinner, low-loft batting. The tradeoff is precision: you have to sew an exact 1/4" seam. If your seam drifts to 5/16", a 2 1/4" strip may not reach far enough around to cover your stitches on the back, so try it on a small sample first.

Narrow 2" strips suit wall hangings with thin craft batting, while wider strips up to 3" suit thick polyester. For everyday quilts, 2 1/2" remains the most reliable width.

The cut width is not the width you see. Once the strip is folded and wrapped around the edge, the visible binding is much narrower, and its exact width depends on your seam allowance and how thick the quilt is.

Straight grain versus continuous bias binding

The direction you cut the strips decides how much they stretch:

• Lengthwise grain runs parallel to selvages with almost no stretch.
• Crosswise grain runs across the width of fabric (WOF), with slight give.
• Bias runs at a 45-degree angle to selvages and stretches a lot.

For square or rectangular quilts, crossgrain straight strips are best. They lie flat along straight borders without stretching out of shape, cut quickly, and use less fabric than bias strips.

Continuous bias binding stretches easily, which makes it the right choice for curved corners, scalloped borders, or circular quilts where straight strips ripple. On straight edges, that stretch can pull borders into ripples if you pull the strip while sewing.

The table above shows the fabric square needed for continuous bias tube binding. For example, a 50" x 65" throw needs one 27" square, or 3/4 yard.

How to calculate binding fabric and strip count

Working out the strips and fabric takes three steps: find the perimeter, add 12" for the corners and the join, then divide by the usable width of the fabric, allowing for the diagonal seams.

First, calculate the perimeter:

• Perimeter = 2 x (width + length)

Next, add 12" to that perimeter. The extra covers the four mitered corners and the overlap where the two ends are joined. The binding calculator lets you choose anywhere from 6" to 24"; 12" is a comfortable amount for most quilts.

Then divide by your usable fabric width, which is about 42" after trimming selvages from standard cotton.

Simply dividing by 42" ignores the fabric lost in diagonal joins. Each 45-degree seam uses about one strip width (2 1/2" per join).

Here is why that matters on a 90" x 108" queen quilt:

• The perimeter is 2 x (90" + 108") = 396".
• Adding 12" for corners and tails brings the total needed to 408".
• Dividing 408" by 42" gives 9.71 strips, which looks like 10 strips.
• Ten strips yield 420" of raw fabric, but nine diagonal joins consume 9 x 2 1/2" = 22 1/2".
• That leaves only 397 1/2" of usable binding.

The quilt perimeter is 396", which leaves just 1 1/2" of extra fabric. That isn't enough room to turn four corners and join your tails.

You need 11 strips for a queen quilt. Eleven strips provide 462" of fabric, leaving 437" of usable binding after 10 joins. Eleven 2 1/2" strips take 27 1/2" of fabric, which rounds up to 7/8 yard.

To find strip counts for any size, use the Quilt Binding Calculator.

How to bind a quilt step by step

Binding is the last step. Before you start, the quilt top, batting and backing should already be layered and quilted together.

You'll need:

• Binding fabric (the table above shows how much)
• A rotary cutter, ruler and cutting mat
• A sewing machine, ideally with a walking foot
• Thread to match the binding
• An iron
• Pins or binding clips
• A hand-sewing needle, if you'll finish by hand

This is the same method taught in Utah State University Extension's guide to double crosswise grain binding.

Clear a wide workspace so the weight of the quilt is supported without dragging off the table. Dragging pulls on your needle and can distort your seam allowance.

1. Trim and square up the quilt sandwich

Lay the quilt flat on a cutting mat. Use a square ruler to trim excess batting and backing flush with the quilt top, checking that all four corners form 90-degree right angles. If your borders have pieced seams, you can also stitch an optional line 1/8" inside the raw edge all the way around, which stops those seams pulling open while you handle the quilt.

2. Cut strips across the width of fabric

Align fabric selvages and square up the cut end. Cut strips across the width of fabric at your chosen width, such as 2 1/2". Trim the selvages off both ends so their tighter weave doesn't pucker the finished edge.

3. Join strips with 45-degree diagonal seams

Joining strips on the diagonal spreads the bulk of each seam along the binding. A straight seam puts it all in one spot, which leaves a lump once the strip is folded.

Lay one strip right side up, running left to right. Lay the second strip on top of its right-hand end, right side down, running up at a 90-degree angle, so the two make an L. Draw a line across the square where they overlap, from its bottom-left corner to its top-right corner, as in the diagram. Pin, then stitch on the line.

Open the strips and check that they form one straight strip with no twist. Then trim the seam allowance to 1/4" and press it open so it lies flat. Repeat until all your strips are joined.

4. Press the strip in half lengthwise

Fold the pieced strip in half lengthwise, wrong sides together, aligning the raw edges. Press flat with a hot iron, pressing straight down rather than sliding the iron, so you don't stretch the strip. Wind the strip into a loose coil to keep it clean and untangled as you move to the sewing machine.

5. Sew the binding to the quilt

Install a walking foot so all layers feed at the exact same rate. Start along a straight side, at least 8" to 10" from a corner. That leaves room to handle the two tails when you join them at the end.

Leave an unstitched starting tail of 8" to 10" so you have room to join the ends later. Align the raw edges of the folded binding with the raw edge of the quilt. Decide now how you'll finish: if you'll finish by hand, sew the binding to the front of the quilt; if you'll finish by machine, sew it to the back. Stitch with a 1/4" seam allowance until you approach the first corner.

6. Miter corners neatly

A neat mitered corner depends on where you stop sewing. Stop stitching exactly 1/4" before the quilt edge. That 1/4" margin leaves room for the upcoming seam allowance; sewing past it traps fabric inside the fold and creates bulky corners. You can mark a pencil dot 1/4" from the corner as an exact target. Take two backstitches and lift the presser foot.

Fold the strip in two distinct steps:

1. Fold the binding up, away from the quilt, so it makes a 45-degree fold at the corner. Its raw edges should now line up with the raw edge of the next side.
2. Holding that fold in place, bring the binding back down onto the next side. The new fold sits level with the top edge of the quilt, and the binding's raw edges line up with the quilt's raw edge.

Place the needle at the top fold, backstitch to anchor the corner, and sew down the new side with a 1/4" seam. Repeat at all four corners.

7. Join the two loose ends cleanly

Joining the two ends takes a little patience the first time. The overlap method below gets the length right before you sew the last seam. Stop sewing 8" to 10" before your starting stitch, leaving an open gap with two loose tails. Overlapping the tails by the exact cut width of the strip gives just enough fabric for a 45-degree diagonal seam:

1. Lay the starting tail flat along the quilt edge. Lay the ending tail on top of it, running the other way.
2. Trim the ending tail so the two overlap by exactly the cut width of your strip: a 2 1/2" overlap for 2 1/2" strips.
3. Open both tails out flat. Place the starting tail right side up and the ending tail on top of it, right side down, at a 90-degree angle to form an L.
4. Draw a line across the overlap from its bottom-left corner to its top-right corner, the same way you joined the strips, and pin.
5. Before you sew, check the fit: with the pins in, refold the binding in half and lay it along the open gap. It should lie flat against the quilt with no twist and no slack.
6. Stitch on the marked line, check the fit once more, then trim the seam allowance to 1/4" and press it open.
7. Sew the remaining opening closed with a 1/4" seam, overlapping your starting and stopping stitches.

8. Finish by hand or machine

Press the sewn binding outward away from the quilt center, then fold it over the raw edge to the opposite side.

Hand finishing

Hand finishing takes longer but leaves no visible stitches on the back. If you sewed the binding to the front, fold it around to the back so it covers the machine stitches by 1/16". Clip in place, folding back corners in the opposite direction from the front to spread seam bulk across both sides of the quilt.

Using a hand needle with matching 50-weight cotton thread, sew with an invisible blind stitch. Take a tiny bite of the backing fabric, then slide the needle inside the fold of the binding for about 1/4" and bring it out. Pull gently until the stitch disappears into the fold, and keep the stitches small and evenly spaced. Work around the quilt, securing each corner miter with small stitches.

Machine finishing

Finishing by machine is much faster and makes a sturdy edge. Sew the binding to the back first: when you fold it to the front, you can see exactly where your topstitching lands instead of guessing from the back.

Clip the binding in place so its folded edge sits about 1/16" past the line of stitching that attached it. That way the topstitching catches the binding all the way around. Fold crisp miters at each corner. Using a walking foot, topstitch on the front 1/16" inside the folded edge. Pivot at each mitered corner with the needle down so your stitches stay continuous.

Troubleshooting common binding problems

If your binding doesn't turn out quite as expected, these fixes can help.

Corners that will not lie flat

If a corner feels bulky or rounded, stitches likely ran past the 1/4" mark into the corner allowance, trapping fabric inside the fold.

Pick out the last three or four stitches before the corner on both sides. Refold the miter with a sharp diagonal crease and restitch, stopping exactly 1/4" before the edge. On the back, fold the corner in the opposite direction from the front to spread bulk.

Binding that comes up short

If your binding ends up an inch or two short, never stretch the fabric to make the ends meet. Stretching pulls borders out of square and leaves permanent ripples.

Instead, open a few inches of starting stitches to free up tail length. Cut a 6" length from a leftover binding strip (or a new strip the same width), join it to one tail with a 45-degree diagonal seam, press open, and refold. You can then re-measure your overlap and complete the join normally.

Wavy edges along the sides

Wavy binding happens when the binding strip or quilt sandwich stretches under the presser foot during sewing. Once released from the machine, the stretched fabric contracts into ripples.

Always sew binding with a walking foot, which feeds all layers at the same rate. Let the machine feed naturally without pulling the strip or pushing the quilt. If slight waves appear, a burst of steam followed by a wooden pressing clapper can help flatten them.

Frequently asked questions about quilt binding

What is the best width to cut quilt binding strips?

Strips cut at 2 1/2" are the standard choice because they fold easily around medium- and high-loft batting without straining the quilt edge. Strips cut at 2 1/4" produce a narrower, flatter binding on low-loft batting, but they require a strict 1/4" seam allowance so the folded edge catches on the back.

How much extra binding should I add to my quilt perimeter?

Add 12" to the perimeter of your quilt. That extra covers the four mitered corners and the overlap where the two ends are joined, so you never have to stretch the binding to make it fit.

Should quilt binding be cut on the straight grain or the bias?

Standard square and rectangular quilts should be bound with straight-grain strips cut across the width of fabric. Straight-grain strips are faster to cut, use less fabric, and don't stretch out of shape along straight borders. Reserve continuous bias binding for quilts with curved, scalloped, or circular edges.

How do you join the ends of quilt binding so it lies flat?

Leave an 8" to 10" opening on the quilt edge and overlap the two loose tails by the cut width of the strip, such as 2 1/2". Open the tails, place them right sides together at a right angle, mark a 45-degree line and pin. Check that the binding lies flat before you sew, then stitch, trim the seam to 1/4", press it open and sew the opening closed.

How many binding strips do I need for a queen-size quilt?

A standard 90" x 108" queen quilt has a perimeter of 396" and needs 408" of binding with the 12" addition. From 42" usable cotton, you need 11 strips cut at 2 1/2" wide, which takes 7/8 yard of fabric. Ten strips fall short because nine diagonal joins use 22 1/2" of length.

Do you sew quilt binding to the front or the back first?

For hand finishing, sew the binding to the front of the quilt first, fold it around to the back, and secure it with an invisible blind stitch. For machine finishing, sew the binding to the back of the quilt first, fold it to the front, and stitch 1/16" from the folded edge so the visible topstitching stays straight.

Why do my quilt corners stick out or look bulky?

Bulky corners happen when stitching runs past the 1/4" mark at the edge of the quilt sandwich. Always stop sewing exactly 1/4" before the corner, backstitch, fold the strip up at a 45-degree angle, and then fold it straight back down flush with the next edge before sewing again.

How can I stop my quilt binding from becoming wavy?

Wavy edges happen when the binding strip or quilt sandwich stretches under the presser foot. Use a walking foot to feed all layers evenly, square up the quilt before you start, and guide the binding strip gently without pulling or tugging as you sew.

Before cutting into your fabric, calculate strip counts and yardage for your exact quilt size with the Quilt Binding Calculator. To plan the rest of your fabric purchases, see our guides on how much fabric you need for a quilt and how to piece a quilt backing.

Every figure in this guide comes from QuiltHelper's calculators, which round fabric up and are tested against hand-worked examples. You can read how we check the math.