Quilt Binding Length
Binding strips and yardage from quilt dimensions.
Extra to join the two ends — 12–24in.
Bolt width less selvage, ~40in on 44in cotton.
2.5in for double, 1.25in for single binding.
7 strips
Cut 2.5in strips across the bolt, joined end to end.
- Perimeter
- 220 in
- Binding needed
- 244 in
- You'll have
- 280 in joined
- Fabric yardage
- 17.5 in
Tip: cut on the cross-grain for straight edges and on the bias for rounded or scalloped quilts.
About This Tool
The Quilt Binding Length calculator turns the finished size of your quilt into the exact length of binding you need, the number of strips to cut, and the yardage of fabric that yields them.
You enter the quilt width and length, an overlap allowance for joining the two ends, your usable fabric width and the strip width you cut.
It measures around the whole perimeter, adds the tail, then divides by the bolt width to find how many strips end to end will wrap the edge.
The result prevents the classic bind-halfway panic where you run out of binding with a bare corner still to finish.
Why Quilt Binding Length Math Matters
Binding is the last step of a quilt and the one you least want to run short on, because a half-bound quilt sits unfinished for weeks.
Buy too little fabric for the binding and your chosen coordinating print may be discontinued before you can top up.
Cut too many strips and a fat eighth of a special fabric is wasted that could have gone into another project.
Getting the length right also makes the join cleaner, since you can plan the two ends to overlap by a known amount rather than guessing on the floor.
Accurate binding math speeds the whole finish, letting you fold, press and stitch with confidence instead of splicing surprise strips mid-run.
It is the sort of dependable number that quilters bookmark and share, which is exactly how a helpful tool earns its place.
The Formula
Perimeter = 2 x (width + length). Binding length = perimeter + tail allowance. Strips = ceil(binding length / usable fabric width). Yardage = strips x strip width / 36.
- Width and length —
- the finished quilt measurements in inches, taken after squaring the top
- Tail allowance —
- extra length folded and overlapped to join the two binding ends, usually a dozen inches or more
- Usable width —
- the bolt width minus the selvage, the length each cross-grain strip contributes
- Strip width —
- how wide you cut each strip, set by the finished binding width and whether it is single or double
The tool rounds strips up to a whole number and converts the total into yards and inches for the cutting table.
Worked Example: Step by Step
- 1Take a lap quilt that finishes at 50 inches wide by 60 inches long.
- 2The perimeter is 2 times 50 plus 60, which equals 220 inches around the edge.
- 3Add a 24-inch tail for mitering and joining the ends, giving 244 inches of binding.
- 4Cutting from 44-inch cotton with about 40 inches usable, each strip contributes 40 inches, so 244 divided by 40 rounds up to 7 strips.
- 5Seven strips at 2.5 inches wide equals 17.5 inches down the bolt, which the tool reports as about half a yard.
- 6Join the strips end to end on a diagonal seam, press in half, and you have smooth binding with a spare corner to spare.
How to Use This Calculator
- Measure the finished quilt width and length after squaring the top.
- Set a tail allowance, twelve to twenty-four inches, to join the two ends.
- Enter the usable fabric width, roughly the bolt width minus the selvage.
- Choose the strip width, two and a half inches for double binding.
- Read the strip count and yardage, then cut a little long and trim on the machine.
Key Terms
- Binding
- A strip of fabric wrapped and stitched over the raw edge of a quilt to finish and protect it.
- Double binding
- Binding folded twice over the edge for a fuller, sturdier lip, usually cut two and a half inches wide.
- Tail allowance
- The extra binding length left at both ends to overlap, tuck and miter the join neatly.
- Cross-grain strip
- Binding cut straight across the weave, the normal choice for square quilt edges.
- Bias binding
- Strip cut on the diagonal so it stretches, essential for curved or scalloped quilt edges.
- Usable width
- The bolt width you can actually stitch, measured in from the two selvage edges.
Quilt Binding Length Reference Table
| Quilt size | Perimeter | Strips at 40 in |
|---|---|---|
| Baby 30 x 30 | 120 | 4 |
| Lap 50 x 60 | 220 | 7 |
| Twin 68 x 88 | 312 | 9 |
| Queen 90 x 95 | 370 | 10 |
| King 108 x 96 | 408 | 11 |
Strip counts include a 24-inch tail and assume 40 inches usable from a 44-inch bolt. Add one more strip for very thick loft or a generous miter, and always join with a dry run first.
Common Mistakes & Pro Tips
- Measuring before squaring the top. A crooked quilt edge is longer than your straight-edge figure, so bind runs short; square and re-measure first.
- Forgetting the tail. The two ends must overlap and be tucked into the corner, so build in at least a dozen inches beyond the bare perimeter.
- Cutting strips on a narrow bolt and not re-checking. A craft-store fabric at 36 usable width needs more strips than a wide 44 or 54 inch one.
- Under-cutting for curved edges. Rounds and scallops consume extra binding as the strip turns, so switch to bias and add a strip or two.
Real-World Use Cases
- Finishing a first quilt without the dreaded mid-bind run-out at the last corner.
- Planning binding from a precious fabric where a fat quarter must be stretched to cover the whole edge.
- Batching quilts for a charity drive, working out binding yardage for ten quilts in one shopping trip.
- Matching a double-fold binding to a thick winter quilt with high loft batting.
- Deciding whether to cut straight cross-grain strips or take the bias route for a wavy edge.
- Trimming leftover strips into a labeled binding stash sized for your next project.
Quilt Binding Length: Frequently Asked Questions
How much binding does a queen quilt take?
A typical 90 by 95 inch queen has about 370 inches of perimeter, so with a tail you cut roughly ten strips from a 44 inch bolt. Check the tool with your own finished measurements to confirm.
Should I cut binding on the bias?
Only for curved or scalloped edges, because bias stretches around the turn without puckering. Straight square quilts bind cleanly and more cheaply with cross-grain strips, which also hold a crisper fold.
What is the tail allowance for?
It is the extra length you leave at both ends so they can overlap, be tucked into the miters and sewn together. Twelve to twenty-four inches covers most quilts comfortably.
Do I need more binding with thick batting?
Slightly, since a loftier quilt sandwiches a little more fabric around the edge. Add one extra strip for high-loft wool or cotton batting, and more still on a large bed quilt.
Can I piece short strips together?
Yes, as long as you join them with diagonal seams and press them open. The calculator counts the total length, so short offcuts still add up toward the run and save good fabric.
This page explains how the quilt binding length works, what each input means and where the numbers come from, so you can plan your next make with confidence.
Written by Bobbin & Form Editorial Team
Home sewists & machine-embroidery practitioners
Reviewed by Marie Delacroix
Custom sewist & machine-embroidery technician, 15 years at the machine
Formulas follow standard sewing and needlework references. Results are estimates — always confirm against your pattern and a pre-washed swatch.
Sources & further reading
- Threads Magazine — fabric cutting & yardage guides
- ISO 13934 — textile tensile & fabric property standards
- Your local fabric store's bolt-width charts