Generate IBAN from Country Code + BBAN
You can paste with spaces; they will be removed automatically.
Validate Existing IBAN
What an Online IBAN Calculator Does
An online IBAN calculator helps you either create a full International Bank Account Number (IBAN) from a country code and BBAN, or verify whether an existing IBAN is valid. This is especially useful for cross-border transfers, SEPA payments, payroll systems, and accounting workflows where one wrong digit can delay a transaction.
IBAN stands for International Bank Account Number. It is a standardized format used in many countries to identify bank accounts accurately. A complete IBAN includes:
- A 2-letter country code (for example, DE, FR, IT, ES)
- 2 check digits (calculated using MOD-97)
- A country-specific BBAN section (bank + branch + account details)
How This Calculator Works
1) IBAN Generation
When you enter a country code and BBAN, the calculator computes the correct two check digits using the ISO 13616 algorithm. It then returns the complete IBAN in both compact and human-friendly grouped format.
2) IBAN Validation
For validation, the tool removes spaces, moves the first four characters to the end, converts letters to numbers (A=10 ... Z=35), and performs a MOD-97 check. If the remainder equals 1, the IBAN is mathematically valid.
It also checks expected IBAN length for the country whenever the country code is recognized.
Why an IBAN Checker Matters
- Prevents failed payments: Catch typos before you send money.
- Reduces bank fees: Avoid correction and rejection charges.
- Improves compliance: Cleaner data in finance and ERP systems.
- Saves time: No manual check-digit calculations required.
Common IBAN Entry Mistakes
Spacing and formatting issues
Users often copy IBANs with spaces, tabs, or punctuation. The calculator automatically sanitizes input, but make sure you are using only letters and digits.
Wrong country code
A valid account number with the wrong country code will fail. Always confirm the beneficiary country before generating or validating.
Truncated BBAN
Some systems cut off leading zeros. Leading zeros are significant in many banking formats, so never remove them unless your bank specifically instructs you to.
Practical Tips for International Transfers
- Validate the IBAN before every large transfer.
- Pair IBAN checks with SWIFT/BIC verification when required.
- For recurring payments, store IBAN in standardized uppercase format.
- Keep audit logs of validation outcomes for accounting controls.
FAQ
Is a valid IBAN guaranteed to be an active account?
No. Validation confirms mathematical and structural correctness, not whether the account is open or accepts incoming payments.
Can I use this tool for SEPA payments?
Yes. This calculator is useful for SEPA workflows because SEPA relies heavily on correctly formatted IBAN data.
Does IBAN include SWIFT/BIC?
No. IBAN and SWIFT/BIC are different identifiers. Some transfers require both.
Final Note
Use this online IBAN calculator as a fast first-line check before submitting bank details in your payment platform, invoicing system, or bookkeeping process. It can dramatically reduce payment errors and speed up international settlement.