Input Measurements
Live Auto-Calculation
Output Summary
Verified Spec
Calculating...
Initial output value
Backing Cut Dimensions
68.0" × 88.0" (2 panels)
Backing Fabric Yardage
4.89 Yards (4.47 m)
Binding Strips Required
7 Strips (2.5" wide)
Binding Yardage Required
0.49 Yards (~18")
✓ Copied to clipboard!
⭐ Recommended Industry Resource
Need rotary cutters, cutting mats, and quilting rulers? Explore verified craft and quilting tools.
Explore Verified Standards →
How to Use the Quilt Fabric Yardage Calculator
- Select your desired options and garment / fabric specifications from the input fields above.
- Enter your measurements with high precision using the labeled unit selectors (inches, centimeters, or grams).
- Review the live calculation summary in the prominent result card to confirm fabric yardage, cuts, or conversions.
- Use the "Copy Specification" button to save your cutting specification to your tech pack or pattern notes.
Documented Textile Industry Formula
Quilt Backing & Binding Formulas
- 1. Total Backing Width = Quilt Width + (Overage × 2)
- 2. Total Backing Length = Quilt Length + (Overage × 2)
- 3. If using standard 42" cotton: Seamed panels needed = ceil(Total Width / 40" usable)
- 4. Backing Yardage = (Panels × Total Length) / 36 inches
- 5. Perimeter = (Quilt Width + Quilt Length) × 2 + 15 inches join allowance
- 6. Binding Strips = ceil(Perimeter / 40" usable) ➔ Binding Yardage = (Strips × Strip Width) / 36
Worked Calculation Example
Real-World Scenario: A 60" × 80" Throw Quilt with a 4-inch longarm overage and 2.5" binding on 42" quilting cotton.
- • Backing Size = (60 + 8) × (80 + 8) = 68" × 88"
- • Backing Panels = 68" / 40" usable = 2 panels
- • Backing Yardage = (2 × 88") / 36 = 176 / 36 = 4.89 Yards ➔ 5.0 Yards
- • Perimeter = (60 + 80) × 2 + 15 = 295 inches
- • Binding Strips = 295 / 40 = 7.37 ➔ 8 strips of 2.5"
- • Binding Yardage = (8 × 2.5") / 36 = 20 / 36 = 0.56 Yards (approx. 5/8 yd)
You need 5.0 yards for seamed backing and 0.625 yards for double-fold binding.
Frequently Asked Questions
Why do longarm quilters require 4 inches of extra backing on all sides?
Longarm quilting machines use specialized rolling clamps to grip the backing fabric firmly. If the backing is the exact size of the quilt top, the clamps will interfere with the stitching needle along the edges.
How many binding strips do I need for a quilt?
Calculate your quilt perimeter in inches, add 15 inches for corner miter joints, and divide by 40 inches (the usable width of quilting cotton). Round up to the next full strip.
Is wide 108-inch backing fabric worth it?
Yes! A 108-inch wide backing eliminates the need to measure, cut, and seam multiple pieces of fabric together down the center, giving you a smooth, seamless quilt reverse with zero bulky seams.