Sewing & Quilting Batting Size Calculator
Created by: Emma Collins
Last updated:
Find the right batting size for your quilt. Enter your quilt top dimensions and quilting method to get the minimum batting size needed, the closest standard pre-cut size, and a by-the-yard alternative.
Quilt Batting Size Calculator
SewingFind the right batting size for your quilt top
Quilt Top Dimensions
Quilting Method
Overhang is the extra batting beyond your quilt top edges. 4" is standard for home quilting, 6-8" for longarm.
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What is a Quilt Batting Size Calculator?
A Quilt Batting Size Calculator helps quilters determine the correct batting dimensions for their quilt top. It calculates the minimum batting size needed based on your quilt dimensions and desired overhang, then recommends the closest standard batting size to purchase.
Choosing the right batting size is critical — too small and you won't have enough material to quilt to the edges, too large and you waste money on excess batting. This calculator factors in overhang for quilting, longarm requirements, and matches your needs to standard pre-cut batting sizes.
Batting Size Formulas
Minimum Batting Width: Quilt Top Width + (Overhang × 2)
Minimum Batting Length: Quilt Top Length + (Overhang × 2)
Total Batting Area: Minimum Width × Minimum Length
By-the-Yard Option: Minimum Length ÷ 36 = Yards needed (for roll batting at specified width)
Example Calculation
For a 60" × 80" quilt top with 4" overhang per side:
- Minimum batting width: 60 + (4 × 2) = 68 inches
- Minimum batting length: 80 + (4 × 2) = 88 inches
- Closest standard size: Twin (72" × 90") — fits with room to spare
- By-the-yard alternative: 2.5 yards of 90"-wide roll batting
Common Applications
- Quilt making: Size batting for bed quilts, throw quilts, and wall hangings
- Longarm quilting: Calculate extra-large batting needed for frame loading
- Bulk batting: Determine yards to cut from a roll for multiple projects
- Budget planning: Compare pre-cut vs by-the-yard pricing for your specific size
Tips for Choosing Batting
- Unfold and flatten batting 24 hours before quilting to remove creases
- Check the maximum quilting distance — some battings require closer quilting lines than others
- Match batting weight to your quilt's purpose: lightweight for wall hangings, heavier for bed quilts
- Save batting scraps for small projects like mug rugs, pot holders, and table runners
Frequently Asked Questions
What size batting do I need for my quilt?
Your batting should be at least 4-6 inches larger than your quilt top on all sides. This extra overhang accounts for shrinkage during quilting and gives you room to square up the quilt afterward. For longarm quilting, add 6-8 inches per side as the frame requires extra fabric.
What are the standard batting sizes?
Standard batting sizes are: Crib (45"×60"), Throw (60"×60"), Twin (72"×90"), Full/Double (81"×96"), Queen (90"×108"), and King (120"×120"). If your quilt falls between sizes, always choose the next size up. You can also buy batting by the yard from rolls.
What is the best batting for quilting?
Cotton batting (like Warm & Natural) is the most popular choice — it's breathable, drapes well, and is easy to quilt. Polyester batting is lightweight and warm. Cotton/poly blends offer the best of both. Wool batting is luxurious and warm but more expensive. Choose based on your quilt's intended use.
Does batting shrink when washed?
Yes, cotton batting typically shrinks 3-5% when washed, which creates the desirable crinkled texture in quilts. Polyester batting has minimal shrinkage. If you want a flatter look, pre-wash your batting or use polyester. Most quilters embrace the shrinkage as it enhances the quilted texture.
Can I piece batting together?
Yes, you can piece batting by butting two pieces together (not overlapping) and stitching with a wide zigzag stitch or hand-whipping the edges. This works well for odd-sized quilts or using up scraps. The seam won't show through the finished quilt if done properly.
How much overhang should I leave for longarm quilting?
For longarm quilting, add 6-8 inches per side (12-16 inches total to both width and length). The longarm frame needs this extra material to load and tension the quilt properly. Check with your longarm quilter for their specific requirements.
What batting loft should I choose?
Low loft (thin) batting is best for hand quilting and intricate designs. Medium loft works for most machine-quilted projects. High loft batting is ideal for tied quilts and comforters where you want maximum warmth and puffiness. The loft affects how easily you can quilt through the layers.
Sources and References
- Harriet Hargrave, "Heirloom Machine Quilting", C&T Publishing
- The Warm Company, "Batting Selection Guide", 2024
- Quilters Dream Batting, "Batting Comparison Chart", 2024