Mod 10 Check Digit
Mod 10 Check Digit

Mod 10 Check Digit

This section lists the calculations for determining the Mod 10 Check Digit character.
The calculations for determining the Mod 10 Check Digit character are as follows:
  1. Start at the first position and add the value of every other position together.
    0 + 2 + 4 + 6 + 8 + 0 = 20
  2. The result of Step 1 is multiplied by 3.
    20 x 3 = 60
  3. Start at the second position and add the value of every other position together.
    1 + 3 + 5 + 7 + 9 = 25
  4. The results of steps 2 and 3 are added together.
    60 + 25 = 85
  5. The check character (12th character) is the smallest number which, when added to the result in step 4, produces a multiple of 10.
    85 + X = 90 (next higher multiple of 10)
    X = 5 Check Character
    This bar code illustrates the above example. The digit on the right (5) is the check digit.