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How to manually calculate checksum for Code 128 or GS1-128

Hi Experts,

I am trying to generate a GS1-128 barcode string and I am having the issues with the check digit. My barcode has combination of subset B and C. I have tried to calculate based on calculations given in some websites. But I am not getting correct check digit.

Below mentioned are the examples of my barcodes.

40327641468+99000952123001
40327605999+99000900000000

Example of combination of subsets: Start C FCN1 '4032764146' Set B '8+' Set C '9900095212300'

Please help me how to calculate the check digit manually.

tncode

Here are several Code 128 check character calculation examples.

Suresh Namani

ASKER

Hi,

Thank you for the help.

I tried to calculate based on the examples given in the link.

for the barcode '40327641468+99000952123001' I have calculated as below.

Step1 : 105+(40*1)+(32*2)+(76*3)+(41*4)+(46*5)+ set B values (24*6)+(11*7)+ set C values (99*8)+(00*9)+(09*10)+(52*11)+(12*12)+(30*13)+(01*14)

105+40+64+228+164+230+144+77+792+0+90+572+144+390+14 = 3054

Step2: 103 *29 = 2987

Step3: 3054 - 2987 = 67.

Here I got the chekcsum value 67.

But the barcode mentioned above has the checksum value as 95.

Is there anything mistake happened in my calculation.

Kindly advice.

Thanks & Regards,
Suresh Namani

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