How Much Backing Do I Need For A Quilt

How Much Backing Do I Need for a Quilt? A Comprehensive Guide

Choosing the right backing fabric for your quilt is crucial. Not only does it impact the overall aesthetic, but getting the right amount ensures your project doesn't fall short. This comprehensive guide will walk you through everything you need to know about calculating quilt backing fabric, addressing common concerns and offering valuable tips for a successful quilting experience.

Understanding Quilt Backing Fabric Requirements

Before diving into calculations, it's essential to understand what makes quilt backing fabric different. Unlike the top, which often features intricate designs and piecing, backing fabric typically focuses on consistency and overall appearance. However, it shouldn't be overlooked. Your backing fabric contributes significantly to the quilt's drape, softness, and overall look.

Key Considerations:

• Fabric Type: Consider the weight and drape of the fabric. Heavier fabrics like canvas offer durability but might be less drapable. Lighter fabrics like cotton or flannel provide softness but may require more careful handling.
• Width: Standard fabric width is usually 42-44 inches. Understanding this is key to calculating yardage.
• Shrinkage: Pre-washing your backing fabric is highly recommended to prevent shrinkage after the quilt is completed. This pre-shrinking step is crucial to avoid disappointment.
• Pattern Matching: Some backing fabrics might have prominent patterns requiring careful matching to avoid distortion.

Calculating Backing Fabric: The Essential Formulas

There isn't a single, universally applicable formula, but rather a few approaches depending on your quilt's size and your preference for pattern matching. Let's explore the most common methods.

Method 1: The Simple Addition Method (for minimal pattern matching)

This method works best for solid-colored or small-scale patterned fabrics where precise pattern matching isn't critical.

1. Measure your quilt top: Accurately measure the length and width of your completed quilt top.
2. Add seam allowance: Add 6-8 inches to both the length and width to account for seam allowance and ease of handling during quilting.
3. Divide by fabric width: Divide the length by the width of your fabric (typically 42-44 inches) to determine the number of fabric strips needed for the length. Round up to the nearest whole number.
4. Calculate total yardage: Multiply the number of strips by the yardage per strip.

Example:

Let's say your quilt top measures 70 inches x 90 inches, and you're using 44-inch wide fabric.

1. Add seam allowance: 70 + 8 = 78 inches (length); 90 + 8 = 98 inches (width)
2. Length strips: 78 inches / 44 inches ≈ 1.77 strips. Round up to 2 strips.
3. Width strips: 98 inches / 44 inches ≈ 2.23 strips. Round up to 3 strips.
4. Total yardage: You'll need approximately 2 strips of length and 3 strips of width for approximately 5 yards of fabric. (Note: This is an approximation. Accurate yardage might vary depending on fabric width and seam allowance.)

Method 2: The Advanced Method (for pattern matching)

This method accounts for pattern matching and is ideal for fabrics with larger, more noticeable patterns.

1. Measure your quilt top: As before, measure the length and width of your completed quilt top.
2. Determine pattern repeat: Identify the repeating pattern on your backing fabric. Measure its height and width.
3. Calculate required length and width: Divide your quilt top's length and width by the pattern repeat. Round up to the nearest whole number, ensuring a seamless pattern.
4. Add extra for seam allowance and matching: Add additional fabric for seam allowance (6-8 inches) and to accommodate potential pattern matching adjustments. This extra amount depends on the pattern's complexity; it's usually between 12-24 inches.
5. Calculate yardage: Divide the length requirement by the fabric width to find the number of strips. Multiply this by the yardage per strip and determine the total yardage.

Example:

Imagine a quilt top of 70 inches x 90 inches with a backing fabric that has a 24-inch repeating pattern.

1. Pattern repeats: 70 inches / 24 inches ≈ 3 repeats (length); 90 inches / 24 inches ≈ 4 repeats (width).
2. Total length: 3 repeats * 24 inches = 72 inches.
3. Total width: 4 repeats * 24 inches = 96 inches.
4. Add extra for seam allowance: Add 24 inches. (72 inches + 24 inches = 96 inches, 96 inches + 24 inches = 120 inches)
5. Calculate yardage: 96 inches / 44 inches ≈ 2.18 strips. Round up to 3 strips. The final yardage required could be approximately 8 yards to allow for some matching.

Method 3: Using a Quilt Backing Calculator

Several online quilt backing calculators are available. These tools streamline the process by inputting your quilt top dimensions, fabric width, and pattern repeat, providing an estimated yardage. While helpful, double-checking the results manually is always recommended.

Tips for Choosing and Using Quilt Backing Fabric

• Pre-washing is crucial: Always pre-wash your backing fabric to prevent shrinkage after quilting.
• Consider fabric weight: The weight of your backing fabric should complement the weight of your quilt top.
• Think about drape: Choose a fabric with the drape you desire for your finished quilt.
• Match your aesthetic: The backing fabric contributes significantly to the overall aesthetic. Select a fabric that complements your quilt top.
• Check for flaws: Inspect the fabric for any flaws before starting the project.
• Accurate cutting: Accurate cutting is crucial for a well-finished quilt. Using a rotary cutter and cutting mat enhances accuracy.
• Seam allowance: Be consistent with your seam allowance to maintain accuracy and clean seams.

Common Mistakes to Avoid

• Underestimating yardage: This is a common issue. It's better to have extra fabric than to fall short.
• Ignoring pattern matching: For fabrics with large patterns, failing to account for pattern matching can ruin the final look.
• Forgetting seam allowance: Insufficient seam allowance can make joining the backing fabric challenging.
• Using unsuitable fabric: Choosing fabric that's too thin, too heavy, or otherwise inappropriate for your project.

Beyond the Basics: Addressing Specific Scenarios

Large Quilts: For exceptionally large quilts, consider joining multiple pieces of backing fabric. Plan your seams carefully to minimize visible joins and maintain the pattern continuity.

Quilts with Binding: The binding will add to the overall dimensions. Account for the binding width in your calculations.

Quilts with intricate designs: The complexity of the quilt top design might affect how the backing fabric is handled during quilting. Consult quilting tutorials for guidance.

Conclusion: The Journey to a Perfectly Backed Quilt

Calculating quilt backing fabric might seem daunting, but by following these methods and taking the necessary precautions, you can achieve a professionally finished quilt that's visually appealing and well-constructed. Remember, accurate measurements, consideration for pattern matching, and a little extra fabric go a long way towards quilting success. Embrace the process, and enjoy the rewarding experience of creating a beautiful, lasting heirloom!