Bobbin Thread Ratio Calculator

Calculate bobbin to needle thread consumption ratio and bobbin change frequency.

Enter the stitch type (301, 401, 504) value for this calculation.
class
Enter the bobbin capacity value for this calculation.
yards
Linear measurement in the specified unit.
inches
Enter the stitches per inch value for this calculation.
SPI

Results

Bobbin to Needle Ratio:
Calculated ratio between values.
-:1
Garments per Bobbin:
Value expressed as a rate (per unit).
-pieces
Bobbin Changes (@ 30 pcs/hr):
Value expressed as a rate (per unit).
-changes
Reference: Industry Standards.