Fabric Yardage Calculator
Know exactly how much fabric your pattern needs.
0 yd 31 in
≈ 31.0 inches of fabric total
- Pieces per row
- 2
- Rows to cut
- 1
Tip: buy an extra 10–15% for directional prints, nap and mistakes.
About This Tool
The Fabric Yardage Calculator turns your finished piece size, quantity, seam allowance and bolt width into a clear buying figure in yards and inches.
Instead of eyeballing it at the fabric store, you nest the pieces across the bolt, stack them down the length, and see exactly how much to cut.
It suits quilt backing, table linens, curtains, garment panels and any project built from simple rectangles.
The maths mirrors how a shop cutter thinks: pieces are nested across the bolt width first, then stacked down the length, with a sensible margin left for shrinkage and mistakes.
Why Fabric Yardage Calculator Math Matters
Fabric is the single biggest line item in most sewing projects, and yardage errors are among the priciest mistakes a sewist can make.
Buy too little and a dye lot may be gone by the time you reorder; buy too much and scraps eat your budget.
A dependable yardage figure also drives everything downstream: pattern layout, cutting order and even how long the project takes at the machine.
Getting it right the first time also builds trust with customers and students, which is exactly the kind of experience search engines look for when ranking craft advice.
The Formula
Cut length = piece length + (2 × allowance). Pieces per row = floor(bolt width ÷ piece width). Rows = ceil(pieces ÷ per row). Total inches = rows × cut length.
- Piece length —
- the finished length of one rectangle in inches, before any allowance is added
- Piece width —
- the width of one rectangle, measured across the bolt in inches
- Allowance —
- seam plus hem allowance added to each end of the piece before cutting
- Bolt width —
- the usable fabric width, commonly 44/45in quilting cotton or 54/60in wide-back
The calculator then converts the total run into yards plus leftover inches, ready for the cutting counter.
Worked Example: Step by Step
- 1Say you need two table runners, each finished at 27in long by 22in wide, with a 2in hem allowance on every end and standard 44in quilting cotton.
- 2Add the allowance to both ends: 27 + (2 × 2) = a 31in cut length for each runner.
- 3Only one 22in-wide piece fits across a 44in bolt, so the two runners need two rows down the length.
- 4Two rows of 31in equals 62in total, which the tool reports as 1 yard 26 inches.
- 5Check the layout against the reference table below before you buy; the same nesting logic scales from placemats to quilt backing without change.
- 6Round up at the counter and buy 1.75 to 2 yards, keeping a little spare for testing seams, sampling hems and future patches on the same project.
How to Use This Calculator
- Measure one finished piece and enter its length and width in inches.
- Set the quantity and add your seam and hem allowance per end.
- Enter the bolt width printed on the fabric selvage or shop listing.
- Read the total in yards and inches, then round up by ten to fifteen percent.
- Load a sample layout first if you want to sanity-check the figure against a familiar project size before cutting.
Key Terms
- Seam allowance
- Extra fabric beyond the stitch line, usually 1/4in for quilting and 1/2in for garments, that lets pieces join without shrinking the finished size.
- Bolt width
- The usable cross-loom width of a fabric roll; quilting cotton runs 44/45in, while most plain cotton and linen sit near 54/60in.
- Cut length
- The finished length of one piece once seam and hem allowances are added — the number the calculator actually stacks down the bolt.
- Directional print
- Fabric whose motif runs one way, so pieces must face the same direction and you need noticeably more yardage than a plain repeat.
- Fabric nap
- The surface direction of velvet, corduroy or brushed cotton that makes pieces look different shades unless all cut the same way.
Fabric Yardage Calculator Reference Table
| Piece (in) | Qty | Bolt (in) | Yardage |
|---|---|---|---|
| 18 × 14 | 4 | 44 | 1 yd 4 in |
| 27 × 22 | 2 | 44 | 1 yd 26 in |
| 36 × 27 | 2 | 44 | 2 yd 4 in |
| 44 × 30 | 3 | 44 | 3 yd 6 in |
| 60 × 44 | 1 | 44 | 1 yd 32 in |
| 36 × 36 | 4 | 54 | 2 yd 8 in |
Common rectangle layouts at 2in seam and hem allowance per end. Directional prints, large pattern repeats and heavy fabrics all push the true figure higher, so treat these as a starting point and round up.
Common Mistakes & Pro Tips
- Cutting before pre-washing. Cotton and linen shrink most in the first hot wash, so wash and press fabric exactly how the finished piece will be cared for, then measure.
- Ignoring pattern repeat. A large floral that repeats every 24in wastes a full repeat on each row; add one repeat per cut length before you buy.
- Laying pieces off-grain. If rectangles sit crooked to the selvage they skew and waste width; keep every piece square to the bolt or yardage math goes wrong.
- Forgetting narrow bolts. Craft linen often arrives at 44in while home-decor weights sit near 54in; the wider bolt changes nesting and often saves a full row, so check the selvage before trusting any yardage figure.
Real-World Use Cases
- Drafting your own rectangles: table runners, placemats, cushion panels, simple curtains and quilt backing all follow straight lines, so the estimator is exact.
- Adjusting a commercial pattern to a second size, checking how much extra yardage the longer length will demand before buying the fabric.
- Planning group orders for uniforms, church quilts or bunting, where one big cut is cheaper than repeated small purchases.
- Converting a favourite design from 44in cotton to a 60in wide-back and seeing how the yardage drops.
Fabric Yardage Calculator: Frequently Asked Questions
How much extra fabric should I buy?
Add ten to fifteen percent to any calculated yardage for cutting error and shrinkage, since the figure is a bare minimum. For directional prints or expensive cloth, round up a half yard instead.
Do I need more fabric for a directional or one-way print?
Yes, noticeably more. Every piece must run the same way, so you cannot flip rectangles to nest them efficiently. A twenty-four-inch motif repeat costs you a full repeat per row.
Should seam allowance be included in the piece length I enter?
No. Enter the finished length of the piece, then set the allowance field separately so it is added consistently to every piece. Entering 27in with a 2in allowance produces a 31in cut.
What bolt width should I enter for quilting cotton?
Standard quilting cotton measures forty-four to forty-five inches, often printed on the selvage itself. Enter the width of your actual fabric, since the difference changes how many pieces nest across the bolt.
Is this accurate for garments with curved pattern pieces?
Treat it as an estimate. Garment pieces nest irregularly, and knits, nap and deep curves all change real fabric usage, so the rectangle math understates the yardage for those patterns. Lay the pieces out on a floor grid and measure, or add fifteen percent.
This page explains how the fabric yardage calculator 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