IBAN Calculator

Calculate an IBAN: turn a country, bank code and account number into a correctly formatted, valid IBAN, with the two check digits computed for you.

Turn a country, bank code and account number into a complete IBAN. This IBAN calculator formats the parts the way each country expects and works out the two mod-97 check digits, so you get a valid IBAN ready to copy for a form or a transfer.

Read the guide: How to Build an IBAN From a Bank Code and Account Number

Account details

Your IBAN

DE89 3704 0044 0532 0130 00

How it works

  1. 1

    Pick the country

    Choose the country the account belongs to so the right format is used.

  2. 2

    Enter bank and account

    Type the national bank code and the account number exactly as your bank shows them.

  3. 3

    Copy your IBAN

    The IBAN appears instantly with its check digits. Copy it with one click.

Instant & 100% private — nothing is uploaded

Every calculation runs locally in your browser. The income, balances and goals you enter stay on your own device and are never sent to a server — nothing is stored, logged or shared.

Frequently asked questions

How do I calculate an IBAN from an account number?
Pick the country, then enter your national bank code and account number. The tool formats them and computes the two mod-97 check digits, giving you the complete IBAN.
Does a calculated IBAN definitely work?
It is mathematically valid, so the format and check digits are correct. Whether the account exists is up to your bank; always confirm important details with them.
Which countries are supported?
The check digits are computed for every country that uses IBAN. A structural breakdown of bank and account parts is shown for the most common ones.

Important

For information and planning only — not financial, tax or legal advice. These figures are estimates; rates, fees and rules vary, so confirm anything that affects a real decision with a qualified professional or the official source.

Related tools

More tools

IBAN ValidatorCheck an IBAN and see the bank code, account number and BIC.IBAN GeneratorGenerate random valid example IBANs for testing and demos.Account Number CheckerValidate a German account number's check digit.BIC / Bank Code FinderLook up a German BIC from a bank code or bank name.Mortgage CalculatorMonthly payment with taxes, insurance and a full amortization schedule.Loan CalculatorMonthly payment and total interest for any fixed-rate loan.

More from the Hivly network

Free sister tools on our other sites.

Length ConverterMetres, feet, miles, inches, km and more, instantly.Scientific CalculatorPowers, roots, trig, logs, memory and history.Age CalculatorExact age in years, months and days, plus your next birthday.