Quilt Fabric Calculator
Calculate quilt backing yardage, binding strips, and batting dimensions for baby, crib, twin, full, queen, and king quilts with longarm overage margins.
Designed for quilters: determine the exact backing yardage needed for any quilt size using standard 44/45" quilting cotton or 108" wide-backs. Computes binding strip requirements (2.25" or 2.5" cuts), longarm 4-inch overage buffers, and vertical vs horizontal seams.
Key Features & Calculations
- Standard quilt size presets (Baby, Throw, Twin, Full, Queen, King)
- Calculates both 44" standard bolts and 108" wide-backs
- Binding strip calculator with mitered joining allowance
- Longarm quilting 4-inch perimeter buffer included
- Compares horizontal vs vertical backing seams to minimize waste
Frequently Asked Questions
Why do quilt backings need 4 inches of extra fabric on all sides?
Longarm quilting machines use rolling clamps that require at least 4 inches of backing and batting overage on each of the four sides (8 inches total extra width and length) to secure the quilt sandwich.
How much binding fabric do I need for a queen size quilt?
A queen quilt (approx. 90" × 108") has a 396" perimeter and requires ⅔ to ¾ yard of 44" fabric cut into 2.5-inch strips.
What are 108-inch wide-backs?
Wide-backs are specialty 108" (or 118") wide cotton fabrics manufactured specifically for quilt backs, allowing you to back full, queen, and king quilts seamlessly.