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Check Digit Calculator
The last digit of a bar code number is a computer Check Digit which makes sure the bar code is correctly composed.
ID Key Format |
Item Reference
(without Check Digit) |
Check
Digit |
Format |
 Pre Printed UPC Code Labels
Compliance UPC label service bureau can print small to large quantity labels and ship within 24 hours.
Many stock sizes available.
| Item # | Item Name | 2,000 Price | 5,000 Price | 10,000 Price |
| ABLT-21-UPC |
UPC Labels (1.5" x 1" ) |
$31.50/1000 |
$25.60/1000 |
$23.00/1000 |
| ABLT-121-UPC |
UPC Labels (1.25" x 0.50" ) |
$31.50/1000 |
$25.60/1000 |
$23.00/1000 |
How to calculate a Check Digit manually
Using sample code 72641217542 as an example, follow the 5 steps below to find the check digit:
Step One: From the right to the left, start with odd position, assign the odd/even position to each digit.
Step Two: Sum all digits in odd position and multiply the result by 3. (7+6+1+1+5+2)*3=66
Step Three: Sum all digits in even position. (2+4+2+7+4)=19
Step Four: Sum the results of step three and four: 66+19=85
Step Five: Divide the result of step four by 10. The check digit is the number which adds the remainder to 10. In our case, divide 85 by 10 we get the remainder 5. The check digit then is the result of 10-5=5.
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