Luhn Algorithm (Credit Card Validator)

Math

Validate a number using the Luhn algorithm.

Formula

Luhn algorithm: alternate digits ×2 from right, sum digits, valid if divisible by 10
  • Luhn algorithm: alternate digits ×2 from right, sum digits, valid if divisible by 10

Luhn Algorithm (Credit Card Validator)

Luhn Algorithm (Credit Card Validator) calculation.

Frequently asked questions

How is Luhn Algorithm (Credit Card Validator) calculated?
Luhn algorithm: alternate digits ×2 from right, sum digits, valid if divisible by 10