Description of calculating check digits
ActiveBarcode calculates check digits for most codes automatically.This documentation is only for the sake of completeness.
Modulo 16
Calculation of a checksum according to Modulo 16:Modulo 16 is used by the barcode symbology Codabar. Here is an example of how to calculate the check digit according to Modulo 16:
| Digits: | A 7 8 9 A |
| Reference numbers: | 16 7 8 9 16 |
| Sum of reference numbers: | 56 |
| Calculate checksum: | 56 / 16 = 3 Remainder 8 |
| difference: | 16 - 8 = 8 |
| Check digit | Reference number 8 = 8 |
Reference numbers:
|
00 = 0 01 = 1 02 = 2 03 = 3 04 = 4 05 = 5 06 = 6 |
07 = 7 08 = 8 09 = 9 10 = - 11 = $ 12 = : 13 = / |
14 = . 15 = + 16 = A 17 = B 18 = C 19 = D |