Seam Strength Calculator

Estimate seam strength based on thread strength, stitch density, and seam type.

Enter the thread breaking strength value for this calculation.
lbs
Enter the stitches per inch value for this calculation.
SPI
Enter the seam rows value for this calculation.
rows
Horizontal measurement perpendicular to length.
inches

Results

Theoretical Strength:
Calculated theoretical strength based on your inputs.
-lbs
Practical Strength (70%):
Calculated practical strength (70%) based on your inputs.
-lbs
Seam Efficiency:
Calculated efficiency percentage.
-%
Reference: Industry Standards.