Knitting Production Calculation

  • WPI: Wales per inch is called WPI.
  • CPI: Course per inch is called CPI.
  • GSM: Grams per square meter of the fabric are called GSM.

Some important formula of knitting production calculation have mentioned in the below:

1. Production in length,

= Course per minute/ Course per inch,

Or,

= CPM/CPI

Or,

    Number of feeder× cylinder RPM× time× efficiency

=…………………………………………………………………..

                                   CPI×36

2. Course per inch,

= Course per minute/production in length

3. Course per minute,

= course per inch× production in length

4. Stitch density,

= Course per cm/ Wales per cm

5. Fabric width,

= {(∏× diameter of cylinder× machine gauge)/wales per cm}

Or,

= Number of wales/Wales per cm

Or,

= Number of needle/ wales per cm

6. Fabric weight,

= {(Course per minute× yarn length per course)/ yarn count}

7. Needle number of machine,

= ∏× diameter of cylinder× gauge

8. Yarn length per course,

= Total number of machine× loop length

9. Production of single jersey machine in weight (kg) per hour,

∏×cylinder dia (inch)×cylinder RPM× feeder no.× gauge×stitch length (mm)× tex×60×efficiency

=……………………………………………………………………………………………..……………

                                                           1000×1000×1000

10. Production of double jersey in length,

= Single jersey production in length/2

11. Production of double jersey in weight,

= Single jersey ×2

Example 1:

Example 2:

Example 3:

Example 4:

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