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This class is part of the Explore Sewing With Knits Learning Path.

How to Determine Stretch Percentage in Fabric

Learn how to calculate your fabric's stretch percentage.

Unsure if your fabric has the right amount of stretch? In this quick video, you’ll learn a formula for calculating your fabric’s stretch percentage, so you’ll know if it’s right for your next knit garment.


  1. stretched to amount - starting amount = X

  2. X ÷ starting amount = Y

  3. Y X 100 = % of stretch

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