Work out how much backing fabric a quilt needs — including overhang for quilting — and the most economical seam direction.
How it works: Backing must cover the quilt plus overhang on all sides (longarm quilters usually want 3–4 in). We compare seaming panels vertically vs. horizontally and recommend whichever uses less fabric.
The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.
