Enter Pillow Fabric Details
Formula Used
Front cut width = finished width + 2 × seam allowance + 2 × flange.
Front cut height = finished height + 2 × seam allowance + 2 × flange.
Envelope back panel height = finished height ÷ 2 + overlap + 2 × seam allowance + 2 × flange.
Total cut area = sum of all cut piece widths × heights × quantities.
Usable fabric width = fabric width − 2 × selvedge loss.
Final length = total cut area ÷ usable fabric width × shrinkage factor × waste factor.
Suggested purchase = final yards rounded up to the next one eighth yard.
Example Data Table
| Pillow size | Style | Quantity | Fabric width | Waste | Estimated need |
|---|---|---|---|---|---|
| 18 × 18 in | Envelope | 2 | 54 in | 10% | About 1.25 yd |
| 20 × 20 in | Knife edge | 4 | 54 in | 12% | About 2.00 yd |
| 16 × 24 in | Box pillow | 2 | 60 in | 15% | About 1.75 yd |
How to Use This Calculator
- Select inches or centimeters.
- Choose the pillow cover style.
- Enter finished pillow width and height.
- Add seam allowance, overlap, flange, or box depth.
- Enter fabric width and selvedge loss.
- Add repeat sizes when using patterned fabric.
- Enter shrinkage and waste percentages.
- Press calculate and review the result above the form.
- Download the CSV or PDF result for your records.
Fabric Planning for Pillow Covers
A pillow cover looks simple, yet small measurement errors can waste fabric. This calculator helps you plan before cutting. It combines pillow size, quantity, seam allowance, overlap, flange width, fabric width, print repeats, shrinkage, and waste. The result gives a practical yardage estimate for buying cloth and preparing panels.
Why Accurate Yardage Matters
Fabric stores sell by length, while pillows are cut from rectangles. That difference can confuse beginners. A wide fabric may hold more pieces across the bolt. A narrow fabric may need extra length. Patterned cloth also needs matching space. Repeats, stripes, and directional prints often require more material than plain fabric. Adding a small waste allowance protects the project from trimming, squaring, and cutting mistakes.
Panels, Closures, and Edges
Most pillow covers need one front panel and one back panel. Envelope covers use two overlapping back panels. Box pillows also need a side strip. Flanged pillows add decorative borders around the face. Each style changes the cut size. Seam allowance is added to every sewn edge. Envelope overlap is added so the insert stays hidden. Piping strips can be included when a rounded edge or corded finish is planned.
Using the Result
The calculator first converts all sizes to inches. It then builds the needed cut pieces. Pattern repeats can round piece sizes upward. The total cloth area is divided by the usable fabric width. Shrinkage and waste percentages are added near the end. The final answer is shown in yards and meters, with a rounded purchase amount.
Buying and Cutting Tips
Always prewash fabric when shrinkage is expected. Press it flat before measuring. Square one edge before cutting the first panel. Mark the fabric grain so covers do not twist after sewing. For directional prints, keep the top of each piece aligned. For expensive fabric, test the layout on paper first. Buy a little extra when matching large motifs. Save leftover strips for piping, ties, or repairs.
Common Pillow Mistakes
Do not measure only the finished insert and cut that same size. Covers need seam allowance, closure allowance, and sometimes ease. Very full inserts may need slightly larger panels. Loose cushions may need smaller covers for a crisp surface and fit.
FAQs
How much fabric do I need for one pillow?
It depends on pillow size, fabric width, cover style, seam allowance, and waste. Enter those values to get a more useful yardage estimate.
What is seam allowance?
Seam allowance is extra fabric added around each edge. It gives space for stitching and finishing without reducing the final pillow size.
Why does an envelope pillow need overlap?
Overlap keeps the insert covered at the back opening. Without enough overlap, the pillow form may show or slip out during use.
Should I include shrinkage?
Yes, include shrinkage when the fabric may be washed. Cotton, linen, and many blends can shrink before or after sewing.
What does fabric repeat mean?
Fabric repeat is the distance before a printed pattern starts again. Matching repeats can require extra fabric for neat alignment.
Can this calculator handle box pillows?
Yes. Choose the box pillow option and enter depth. The calculator adds a side strip to the front and back panels.
Why is suggested purchase higher than exact yardage?
The suggested purchase rounds up to a practical buying amount. It also includes shrinkage and waste for safer cutting.
Can I use centimeters?
Yes. Select centimeters before entering measurements. Results still show fabric length in yards and meters for easier buying.