预裁布料计算器 ✂️
计算预切布料的码数等价值。快速了解你的拼布项目需要多少果冻卷、魅力包或层蛋糕。
How to Use the Precut Calculator
Select your precut type and enter how many bundles or pieces you have. The calculator shows total piece count, total fabric area, and the approximate equivalent in regular yardage.
Equivalent yardage = total area ÷ (42" × 36"). This helps when substituting precuts for regular yardage in patterns. Remember that precut edges include seam allowances, so the usable finished area per piece is smaller.
Precuts are ideal for scrappy quilts, but check your pattern's requirements carefully. A pattern calling for 1/4 yard cuts per fabric needs 18" × 21" pieces — fat quarters work perfectly; jelly roll strips would need to be pieced.
常见问题
一卷果冻卷里有多少条？
标准果冻卷含40条，每条宽2.5英寸、长约44英寸（布幅宽度）。有些厂家会含42条。
一个魅力包里有多少方块？
标准魅力包含42个5×5英寸的方块。它们代表一个系列中每种布料各一片，非常适合碎布项目。
我能在一床被子里混用不同类型的预裁布吗？
可以。许多拼布者会组合预裁布——例如用果冻卷做条、用魅力包做点缀方块。我们的计算器可以分别估算每种类型的需求。