边框计算器 🔲
计算拼布边框的用布量和布条数。输入拼布尺寸和最多5种边框宽度，获取每道边框的精确用布量。
How to Use the Border Calculator
Enter your finished quilt dimensions (before adding borders), select 1–5 borders, then enter each border's finished width. The calculator uses 40" usable fabric width by default — update this if your fabric is wider.
The calculator adds 0.5" to each finished border width for seam allowances and calculates total linear inches needed per border. Strips are assumed to be cut cross-grain (across the width of fabric).
Each border's yardage is shown separately since borders are often different fabrics. The total at the bottom combines all borders — useful when planning a same-fabric or scrappy border set.
常见问题
如何计算拼布边框的用布量？
量出周长（2x宽加2x高），加上8x边框宽度作为角部叠加量，除以布幅宽得到布条数，再乘以裁剪宽度即为总用布量。
边框布条应裁多宽？
按成品边框宽度加1.5厘米（缝份）裁剪。7.5厘米成品边框对应裁剪宽度为9厘米。
可以用同一块布料制作所有边框吗？
可以。显示的总用布量是所有边框合计所需的量。使用同一布料时，可以一次性裁出所有布条。