Sample Check Digit Computations

All SSCC-compatible numbers must be 18 digits long. Alphanumeric characters are not allowed.

The following check digit computation is performed for the number to pass the SSCC validation.

Suppose you want to find the check digit for the SSCC Number: 10614141192837465

Step 1

Set up a table with 18 columns, and put the number 10614141192837465 into positions 1-17. Position18 is blank because it is reserved for the check digit.

Step 2

Add the numbers in positions 1, 3, 5, 7, 9, 11, 13, 15, and 17:

( 1 + 6 + 4 + 4 + 1 + 2 + 3 + 4 + 5) = 30

Step 3

Multiply the result of Step Two by 3:

(30 x 3) = 90

Step 4

Add the numbers in Positions 2, 4, 6, 8, 10, 12, 14, and 16:

(0 + 1 + 1 + 1 + 9 + 8 + 7 + 6) = 33

Step 5

Add the results of Step Three and Step Four:

(90 + 33) = 123

Step 6

The check digit is the smallest number needed to round the result of Step Five up to a multiple of 10. In this example, the check digit is 7.