How to Enlarge a Paper Pattern

You may have found the perfect pattern you want sew or create a craft project with, but find that the image isn't as large as you'd like it to be. Don't let a small paper pattern stop you from making a big project. With a few simple math calculations and a copier, you can enlarge patterns quickly and easily to get the results you imagine.

Things You'll Need

• Copy machine
• Scissors
• Cellophane tape

Instructions

1. Determine the difference between the size of the original project and your project in terms of a percentage.

   For instance, to make something twice the size of the original, increase the pattern by 200%.

   If you have finished dimensions in mind, you can calculate this percentage. Divide the finished dimension of one length of your intended project by the finished dimension of the same length of the original project.

   For instance, to make a 5 inch square quilt block into a 7 1/2-inch block, divide 7.5 by 5, resulting in 1.5. 1.5 x 100 = 150, or 150%. The new pattern will be 150% of the size of the original.

2. Make a clean (non-enlarged) copy of the original pattern at a copy shop or on a home copier. If the pattern is in a book, press the book flat on the machine so that the pattern does not distort.

3. Use the clean copy of the pattern to create the enlarged version based on the percentage you determined.

   If you have a multi-purpose scanner-printer-copier with the capacity to enlarge, consult the instructions to learn how to program this percentage into the machine.

   At a copy shop, consult an employee to learn how to program this percentage into the copier (or ask him or her to do this for you).

4. The enlarged pattern may be bigger than standard-sized paper. If so, cut and tape sections of the enlarged pattern together. If taped joints distract you, many copy shops have the ability to print your enlargement on larger paper.

Tips & Warnings

• Many computer design programs have the capacity to enlarge scanned materials digitally. Consult your program's directions to do this.

• Clothing patterns will distort if enlarged in this way. To enlarge a clothing pattern, consult clothing-design resources.

• Determine whether you need additional bracing, seaming, or other reinforcements. Don't compromise the structural integrity of your work or you may be disappointed or injured.

• Adjust your materials list to ensure you have sufficient supplies.

References

• Math.com: 3-way Percent Calculator

Resources

• Read this Article in Spanish
• Quilting Calculators/Charts
• Enlarging Woodworking Patterns