Quilt Binding Calculator — Calculate Fabric Yardage, Strip Count & Binding Length

Determine exactly how much fabric you need for quilt binding. Free online quilt binding calculator with total binding length, number of strips, and yardage in inches and yards.

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Quilt Binding Calculator

Enter your quilt dimensions and binding preferences to calculate the exact fabric yardage needed.

Enter your quilt size and binding details, then click Calculate Binding to see the result.

Quilt Binding Formula Explained

The quilt binding yardage formula calculates how much fabric you need to make continuous double-fold binding for your quilt. It uses the quilt’s perimeter, strip width, and fabric width to determine the exact yardage.

Perimeter = (Quilt Width + Quilt Height) × 2
Total Binding Length = Perimeter + 10 inches (for corners & joining)
Number of Strips = ceil(Total Binding Length ÷ Usable Fabric Width)
Yardage = (Number of Strips × Strip Width) ÷ 36

Variable Definitions

  • Quilt Width / Height — The finished dimensions of your quilt top in inches.
  • Perimeter — The total distance around the quilt, calculated as (width + height) × 2.
  • Total Binding Length — Perimeter plus an extra 10 inches for mitered corners, seam allowances, and the final joining overlap.
  • Usable Fabric Width — The fabric width minus selvedges; typically 40-42 inches for quilting cotton (we use the entered fabric width directly, assuming selvedges are already removed).
  • Strip Width — The width you cut your binding strips, usually 2.25", 2.5", or 2.75".
  • Yardage — The total fabric length needed in yards (1 yard = 36 inches).

How to Calculate Quilt Binding Fabric Step by Step

  1. Measure your quilt — Record the finished width and height of your quilt top in inches.
  2. Find the perimeter — Add the width and height together, then multiply by 2: (W + H) × 2.
  3. Add extra for corners and joining — Add 10 inches to the perimeter. This covers mitered corners and the final overlap.
  4. Decide your strip width — Standard is 2.5 inches (gives a 0.5-inch finished binding). Enter your chosen width.
  5. Calculate number of strips — Divide the total binding length by the fabric width (after removing selvedges). Round up to the next whole strip.
  6. Convert to yardage — Multiply the number of strips by the strip width, then divide by 36 to get the total yards of fabric needed.

Our calculator performs all these steps automatically, displaying the exact yardage and strip count.

Quilt Binding Calculator Examples

Example 1: Throw Quilt (60" × 80")

Standard 2.5-inch strips with 42-inch fabric width.

Perimeter = (60 + 80) × 2 = 280"
Total Binding = 280 + 10 = 290"
Strips = ceil(290 ÷ 42) = 7 strips
Yardage = (7 × 2.5) ÷ 36 ≈ 0.49 yards

Example 2: Baby Quilt (36" × 48")

Using 2.25-inch strips on 44-inch wide fabric.

Perimeter = (36 + 48) × 2 = 168"
Total Binding = 168 + 10 = 178"
Strips = ceil(178 ÷ 44) = 5 strips
Yardage = (5 × 2.25) ÷ 36 ≈ 0.31 yards

Example 3: King Quilt (105" × 105")

2.5-inch strips, fabric 42 inches wide.

Perimeter = (105 + 105) × 2 = 420"
Total Binding = 420 + 10 = 430"
Strips = ceil(430 ÷ 42) = 11 strips
Yardage = (11 × 2.5) ÷ 36 ≈ 0.76 yards

Real-World Quilt Binding Calculator Uses

  • Fabric shopping: Know exactly how much binding fabric to buy before starting a quilt to avoid multiple trips to the store.
  • Scrap management: Determine whether your leftover fabric is enough for the binding, saving money and reducing waste.
  • Custom quilt sizes: Calculate binding for non-standard quilts like wall hangings, table runners, or king-size bedspreads.
  • Bias vs. straight grain planning: Compare yardage when choosing between straight-grain and bias binding strips.
  • Workshop teaching: Use the calculator as an educational tool in quilting classes to demonstrate binding math.
  • Quick estimates: Get instant results when a client or friend asks how much fabric they need for binding.
  • Multi-quilt projects: Plan bulk fabric purchases for multiple quilts with consistent binding requirements.

People Also Ask

Find the perimeter (width + height) × 2, add 10 inches for corners, divide by fabric width to get strip count, then multiply by strip width and divide by 36 for yardage. Our calculator does this instantly.
The most common width is 2.5 inches, which yields a finished binding of about 0.5 inches. Narrower 2.25-inch strips give a smaller finish, while 2.75-inch strips create a wider, more prominent edge.
Add about 10-12 inches to the quilt perimeter. This extra length accounts for mitered corner folds, seam allowances, and the final joining overlap. It ensures you won't run short.
One yard (36 inches) of fabric yields about 14 strips if cut at 2.5 inches wide (36 ÷ 2.5 = 14.4). For 2.25-inch strips you get 16 strips, and for 2.75-inch strips you get 13. Always round down.
Straight grain binding is easier and uses less fabric; it's ideal for quilts with straight edges. Bias binding (cut at 45°) is more flexible and durable – better for quilts with curved edges or heavy use.

Frequently Asked Questions

The basic formula is: Yardage = (ceil((2*(W+H) + 10) / fabric_width) * strip_width) / 36. This calculates the number of strips needed and converts to yards.
Yes, you can use the same formula. However, bias binding typically requires about 1.5 times more fabric because strips are cut diagonally. For a precise bias estimate, multiply the final yardage by 1.5.
The seam allowance for attaching binding is typically 1/4 inch. Our calculator adds 10 inches overall to cover corners and joining, which includes seam allowances. You can adjust the extra length if desired.
For irregular shapes, measure the entire outer edge with a flexible tape measure and use that length as the perimeter. Then add 10 inches and proceed with the same strip and yardage calculations.
Quilting cotton is the most popular choice – it's durable, easy to work with, and comes in endless prints. For a softer finish, some quilters use flannel or lawn. Avoid fabrics that fray easily or stretch too much.
The extra 10 inches provide fabric for mitered corners, overlapping the binding ends, and any slight measuring inaccuracies. Without it, you risk running short and having to piece in an extra strip.

Quilt Binding Glossary

Double-Fold Binding

Also called French binding; strips are folded in half lengthwise and then attached to the quilt, creating a durable edge.

Bias Binding

Binding strips cut at a 45° angle to the fabric grain, offering greater stretch and flexibility for curved edges.

Straight Grain Binding

Strips cut parallel or perpendicular to the selvage. Less stretchy, ideal for quilts with straight sides.

WOF (Width of Fabric)

The measurement from selvage to selvage. Standard quilting cotton is 42–44 inches wide; usable width is often 40 inches after removing selvages.

Mitered Corner

A corner finish where binding is folded at a 45° angle, creating a neat, flat 90° corner on the quilt.

Seam Allowance

The fabric between the stitching line and the raw edge, usually 1/4 inch for quilt binding attachment.

Selvage

The tightly woven factory edge of the fabric that should be removed before cutting binding strips.

Continuous Binding

Binding strips sewn together end-to-end into one long piece before attaching to the quilt.

Editorial Review & Methodology

This quilt binding calculator was built and reviewed by the NumbrWiz Editorial Team. The formulas follow standard quilting mathematics used by major quilting publications, fabric manufacturers, and experienced quilters worldwide.

  • Formula verification: Cross-referenced with trusted quilting resources including The Quilter’s Cache, Craftsy, and fabric industry guidelines.
  • Edge case testing: Tested with very small quilts (wall hangings), oversized king quilts, and fractional strip widths to ensure accuracy.
  • UX review: Designed for clear, intuitive input with helpful defaults and a detailed step-by-step breakdown of every calculation.

Transparency note: All calculations are performed client‑side in your browser. No data is collected, stored, or transmitted. Results are for planning purposes; always measure twice and cut once. Fabric widths and shrinkage may vary by manufacturer – adjust inputs accordingly.

Page last reviewed: May 2026 · NumbrWiz Editorial Team