Luxembourg IBAN Calculator

Enter a Luxembourg bank code and account number to generate a correctly formatted LU IBAN — right length, valid check digits, instantly in your browser.

Calculate a Luxembourg IBAN

Every Luxembourg IBAN starts with LU and two check digits, followed by a 3-character bank code and the account number — 20 characters in total.

Enter the local details below. The calculator pads the account number, computes the ISO 7064 check digits, and prints the result in standard four-character groups.

LU IBAN format

A Luxembourg IBAN packs the whole routing path into one string: LU, two check digits, the 3-character bank code, and a 13-character account section.

In the printed format, k marks the check digits, b the bank code, s the branch, c the account number, and x a national check character.

IBAN length
20 characters
Bank code
3 characters
Account number
Up to 13 characters
Check digits
2 digits after LU
Printed format
LUkk bbbc cccc cccc cccc
Example IBAN
LU28 0019 4006 4475 0000

Frequently asked questions

  • A Luxembourg IBAN is 20 characters: the country code LU, two check digits, a 3-character bank code, and the account section. Printed in groups of four, it looks like LU28 0019 4006 4475 0000.

  • With the ISO 7064 mod 97-10 algorithm. The bank code, account number, and country code are converted to digits, and the two check digits are chosen so the full number leaves a remainder of 1 when divided by 97. The calculator does this for you and rejects any input that cannot produce a valid LU IBAN.

  • Yes. It runs entirely in your browser — the bank details you enter are never sent to a server, stored, or shared. There is no sign-up and no fee.

  • Yes — the calculator covers 41 countries. Pick a different country in the form above, or open its dedicated page from the list below.

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