Stitch Density Calculator

TEXTILE · QUALITY

SPI · SPC · Stitch length · Quality control · Seam evaluation

SPI SPC

Stitches per inch (SPI)

SPI

Stitches per cm (SPC)

SPC

⇄

SPC = SPI / 2.54 | SPI = SPC × 2.54

                        Classification
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Stitch length —

Typical application —

Very fine Fine Medium Coarse Very coarse

Sample length

Number of stitches counted

stitches

Stitch length — mm

Classification — —

SPI = Stitches / (Length in inches) | SPC = Stitches / (Length in cm)

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SPI

                            Overall quality
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                            —
                        

Rating — / 10

Recommendation — —

Standards met — —

✓ ISO 4915

✓ ASTM D6193

✓ Industry standard

Optimal SPI range varies by garment type · Fabric · Seam type