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Quilt Fabric Calculator - Online Yardage & Block Count

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🧵 Quilt Fabric Calculator

Calculate yardage, block count & binding for your next quilting project

Quilt Size
Baby quilt: 36" × 52" — perfect for cribs & strollers
Block & Fabric Settings
2" 16"
in
Standard: ÂĽ" (0.25)
in
Standard quilting cotton: 44"
For multi-color quilt tops
%
in
48
Total Blocks
8 Ă— 6
48"Ă—36"
Actual Quilt Size
matches target
2.75
Quilt Top Fabric
yards needed
3.25
Backing Fabric
yards needed
1.75
Batting
yards (90" wide)
0.55
Binding Fabric
yards (2.5" strips)
Calculation Breakdown
Cut block size:6.5" Ă— 6.5"
Blocks per fabric width:6
Rows per yard (36"):5
Blocks per yard:30
Backing panel width:44"
Backing panels needed:1
Binding strip length:186"
Strips per yard:14
Frequently Asked Questions

To calculate quilt top yardage: divide the quilt width by the finished block size to get blocks per row, and quilt length by block size to get number of rows. Multiply for total blocks. Then determine how many cut blocks (finished size + 2× seam allowance) fit across your fabric width (typically 44"). Divide total blocks by blocks-per-yard to get yardage. Always add 5–10% for miscuts and shrinkage.

The standard seam allowance in quilting is ¼ inch (0.25"). This is used universally for piecing quilt blocks. Some quilters use a "scant" ¼" (slightly less) to account for thread thickness. Accurate seam allowance is critical — even small errors multiply across many blocks and can significantly alter the finished quilt size.

Backing fabric should be 4–6 inches larger than the quilt top on all sides (8–12" total extra in width and length). If your backing width (quilt width + overhang) is ≤ fabric width (44"), you need one panel — yardage = (quilt length + overhang) / 36. If wider, you'll need two panels seamed together — yardage = 2 × (quilt length + overhang) / 36. For larger quilts, consider 108" wide backing fabric to avoid seams.

Binding fabric is calculated from the quilt perimeter: 2 × (width + length) + 10–12 inches for corners and joining. Standard binding strips are cut 2.5" wide. From one yard of 44" fabric, you can cut approximately 14 strips (36" ÷ 2.5"). Each strip is ~44" long, giving ~616" of binding per yard. Divide your total binding length by 40 (a practical rule of thumb) to estimate yardage needed.

TypeWidthLength
Baby / Crib36"52"
Lap / Throw52"66"
Twin70"90"
Full / Double84"90"
Queen90"108"
King108"108"
Sizes can vary by manufacturer. Always measure the mattress and add desired drop length for custom sizing.

Standard quilting cotton is 44–45 inches wide, including selvages. The usable width (selvage to selvage) is typically 40–42 inches. Some premium fabrics come in wider widths (54", 60", or 108" for backing). Always check the actual usable width when calculating how many blocks you can cut per row. Our calculator uses 44" as default with the understanding that selvage edges account for a small loss.

It's recommended to purchase 5–15% extra fabric beyond the calculated amount. Beginners should lean toward 10–15% to account for cutting errors, misaligned seams, and fabric shrinkage during pre-washing. Experienced quilters often add 5%. Also consider buying an extra ¼–½ yard if the fabric is directional or has a large print repeat that requires fussy cutting.

Yes! This calculator works for any quilt pattern based on same-sized square blocks — including patchwork, charm square quilts, and simple grid patterns. For patterns with mixed block sizes (sampler quilts), calculate each block size separately. For half-square triangles (HSTs), add ⅞" to the finished size instead of the standard ½" seam allowance. For strip-pieced quilts, calculate based on strip width instead of block size.
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