Home Knitting gauge & sizing
How do you measure knitting gauge after blocking?
Published by Gauge Post
Wash and dry the swatch as you intend to care for the finished piece. Place a rigid ruler across its flat center, count every whole and partial stitch in a measured span, and divide by that span. Use the fabric and knitting method specified in the pattern.
Give the ruler room
If the pattern gives gauge over 4 inches, make a swatch wide enough to leave a margin on both sides of that span. Match the specified stitch pattern, yarn and needle. For a project worked in the round, use a circular swatch or a technique that reproduces knitting every round from the right side.
Once the swatch is dry, remove any pins and let the fabric settle. Lay the ruler over a single layer without flattening a cable or pulling a rib open. Follow the pattern if it specifies a stretched measurement.
Keep the half stitch
Suppose a 4-inch window contains 21½ stitches. Write down 5.375 stitches per inch. Over a 40-inch circumference that means 215 stitches before shaping. Rounding to 5 stitches per inch at the start would suggest 200, a difference of 15 stitches.
Take a second reading one row higher and a little to the side. If the readings disagree, check that both spans follow a single row and exclude the border. Make a larger swatch if your usable center is too small.
Compare like with like
Keep the original unit on your notes. Four inches is 10.16 centimeters. When a pattern pairs 4 inches with 10 centimeters as a convention, choose one system and use it consistently. Record the needle, stitch pattern, care method and gauge together so you can reproduce the measurement later.