The accuracy of captured data from a coupon scanline is extremely important. For this reason the coupon scan line should include check digits if possible. This check digit calculator allows you to quickly test a check digit validation against your scanlines exactly as they are calculated in the Aqurit product.

For more information on any of the steps that go into a check digit calculation, click on the blue title of the step.

Steps	Data
Example Data:
Start Position of Field:
Length of Field:
Position of Check Digit:
Modulus for Calculation:	2 3 4 5 6 7 8 9 10 11 12 13 14 15
Weighting:
Method of Calculation:	Sum Digits Straight Sum Ones Only
Subtract from Modulus:	Substitution:
Results:
String To Test:
Weight String:
Calculated Sum:
Calculated Digit:
Actual Digit: