# Luhn algorithm calculator

Card Calculator allows you to calculate the luhn check digit using the luhn algorithm. Fill in the box below to have it instantly computed. Luhn check-digit calculator.

How to make sure that your IMEI is correct? The last number of the IMEI is a check digit. We used this calculator as an error detection. Visit our page and see how it works. Weighted Check Digit Calculator. Input Number: Valid: Verhoeff Check Digit Calculator. Hi, I am new comer here. I need a favor to make a formula in Excel to create series of number for Digit Check Digit.

I think the algorithm is not correct. The second step you need to sum the digits of the products instead of substract 9. If you want to calculate online the check digit you can try this calculator. Generate Visa Generate Mastercard Generate American Express . The following spreadsheet mimics the algorithm used to generate Check Digits for Blackbaud Direct Marketing finder numbers. It also detects almost . Change any digit or transpose nearly any two . The steps of the algorithm are as follows: Step 1. Beginning with the second rightmost digit, double all alternate digits of the credit card number. This is how online stores . If the doubling of any digit in a two digit . ICCID numbers (or digits). IMEI codes (digit codes with all decimal digits) are treated as hexadecimal numbers when the digit format is calculated. Every other digit is doubled and . DATA: sum(1) TYPE n VALUE 0. NUMOFCHAR( pi_string ) – 1. Modifier and Type, Method and Description.

It is used by GSM networks to verify the legitimacy of the device. First eight digits are known as TAC (Type Allocation Code), next six digits are the serial number, and the last digit is the check digit. One the advantages of the algorithm is .