TEXTILE · QUALITY
Stitch Density Calculator
SPI · SPC · Stitch length · Quality control · Seam evaluation
SPI
SPC
Convert SPI ↔ SPC
SPI
SPC
⇄
SPC = SPI / 2.54 | SPI = SPC × 2.54
Density classification
Classification
—
—
Stitch length
—
Typical application
—
Very fine
Fine
Medium
Coarse
Very coarse
Measure density from sample
cm
stitches
Measured density
SPI
—
SPI
SPC
—
SPC
Stitch length
—
mm
Classification
—
—
SPI = Stitches / (Length in inches) | SPC = Stitches / (Length in cm)
Quality check & standards
Garment type
—
Fabric type
—
Stitch density (SPI)
SPI
Quality assessment
Overall quality
—
—
Rating
—
/ 10
Recommendation
—
—
Standards met
—
—
✓ ISO 4915
✓ ASTM D6193
✓ Industry standard
Optimal SPI range varies by garment type · Fabric · Seam type