Quilt Calculator
Calculate fabric yardage for quilt backing and batting. Enter quilt dimensions, bolt width, and overage to get precise yardage for your next quilting project.
About This Calculator
Our free Quilt Calculator helps you determine the exact fabric yardage needed for quilt backing and batting. Whether you are making a baby quilt, a queen-size bed quilt, or a wall hanging, this tool takes the guesswork out of fabric shopping. Simply enter your quilt top dimensions, fabric bolt width, and desired overage to get precise yardage requirements.
The calculator supports both directional and non-directional fabrics. For directional fabrics with one-way patterns like stripes or scenic prints, the fabric bolt width runs along the quilt width direction, and the calculator determines how many panels are needed. Non-directional fabrics allow more flexibility in orientation, which can reduce fabric waste and panel count.
The calculation adds your chosen overage to all sides of the quilt top to get the effective dimensions. It then determines how many fabric widths are needed to cover the effective width, computes the total fabric length in inches, and converts to yards. The standard overage of 4 inches per side provides enough margin for quilting tension, seam allowances, and squaring up after quilting.
Batting yardage is calculated based on the same effective dimensions, assuming standard batting widths. This ensures your batting covers the entire quilt area with the same overhang as the backing.
Regional Notes
India (IN): Quilting fabric in India is often available in 44-inch width from local craft stores and online marketplaces. Fabric is typically sold by the meter rather than the yard. To convert yards to meters, multiply by 0.9144. Cotton quilting fabric prices range from ₹200 to ₹800 per meter depending on quality and print.
United States (US): Standard quilting cotton is 44-45 inches wide. Fabric is sold by the yard (36 inches). Specialty backing fabrics in 90-inch and 108-inch widths are widely available at quilt shops. Prices range from $8 to $15 per yard for cotton and $12 to $25 per yard for wide backing fabrics.
United Kingdom (UK): Quilting fabric in the UK is typically sold in 44-inch (112 cm) widths by the metre. Wide backing fabrics in 108-inch (274 cm) widths are available from specialist quilting suppliers. Fabric prices range from £8 to £18 per metre for good-quality quilting cotton.
Frequently Asked Questions
How much extra fabric should I add for quilt backing?
Most quilters add 4 to 6 inches of extra fabric on each side of the quilt top for backing and batting. This provides enough margin for quilting tension, seam allowances, and trimming after quilting. The calculator uses a default overage of 4 inches per side, which is the standard recommended amount.
What is the difference between directional and non-directional fabric?
Directional fabric has a pattern that must run in a consistent direction, such as stripes or one-way prints. Non-directional fabric has a random or all-over pattern that can be oriented in any direction. For directional fabric, the calculator assumes the bolt width runs along the quilt width direction, which may require more fabric. Non-directional fabric allows more flexibility in panel arrangement, potentially reducing waste.
What is the standard fabric bolt width for quilting?
Standard quilting cotton fabric bolts come in widths of 44 to 45 inches. However, wider backing fabrics are available in 90, 108, and even 120 inch widths, which can eliminate the need for piecing backing panels. Always measure your actual fabric width after removing selvages for the most accurate calculation.
How do I piece together quilt backing panels?
To piece backing panels, cut the fabric into equal-width panels based on the calculator results, then sew them together along the long edges using a 1/2 inch seam allowance. Press the seams open to reduce bulk. Trim the joined panel to your effective quilt dimensions before basting the quilt sandwich.
Can I use the same fabric for backing and binding?
Yes, many quilters use the same fabric for both backing and binding to create a coordinated look. However, binding requires bias-cut or straight-grain strips, which need additional yardage beyond the backing calculation. Use a separate quilt binding calculator to determine binding fabric requirements.
How much batting do I need for a quilt?
Batting should be cut to the same effective dimensions as the backing — the quilt top dimensions plus overage on all sides. Batting is typically sold in standard widths of 90 or 120 inches by the yard. The calculator shows batting yardage based on your effective quilt length, using the same dimensions as the backing.
What if my quilt is wider than the fabric bolt?
If your quilt's effective width exceeds the fabric bolt width, the calculator determines how many panels are needed. For example, a 68 inch wide quilt (60 inches plus 4 inch overage per side) on 45 inch wide fabric requires two panels. The calculator automatically computes the number of panels and the total yardage needed.
How do I measure my quilt top for backing yardage?
Measure the finished quilt top from edge to edge in both directions. The shorter measurement is the width and the longer is the length. Always measure after completing the quilt top, as piecing and pressing can slightly alter dimensions from your original plan. Enter these measurements into the calculator along with your desired overage.