Check Digit Calculator

This Check Digit Calculator allows users to input a number and select an algorithm to calculate its check digit, verify the complete number’s validity, and provide the complete number with the check digit appended.

Use Our Check Digit Calculator

How to Use the Check Digit Calculator

This guide will walk you through the steps to calculate a check digit using the Check Digit Calculator. Make sure to follow the steps carefully for accurate results.

Step 1: Enter the Number

  • Locate the Enter Number field on the calculator interface.
  • Enter the number for which you want to calculate the check digit. It must be a non-negative whole number.
  • Ensure you input a valid number as the calculator requires input for processing.

Step 2: Select the Algorithm

  • Find the Select Algorithm dropdown menu.
  • Choose an algorithm that best fits your use case from the following options:

    • Luhn Algorithm (MOD 10)
    • ISBN-10
    • EAN-13
    • Modulus 11

Step 3: Get the Check Digit

  • Once the input number and algorithm are set, the calculator will automatically compute the check digit.
  • The check digit will be displayed as the Check Digit in the results section.

Step 4: View the Complete Number with Check Digit

  • The calculator will append the check digit to your original number, creating a complete number.
  • This complete sequence will be shown in the Complete Number with Check Digit field.

Step 5: Validate the Complete Number

  • To ensure the integrity of the number, the calculator performs a validation check.
  • The validation result will be shown under Validation Result, indicating whether the complete number is Valid or Invalid.

By following these steps, you’ll be able to efficiently use the Check Digit Calculator, ensuring your numerical data is both complete and verifiable.