How to enter an account number into the calculator

A Czech-format account number consists of two parts divided by a hyphen. The first part is optional.

Two-part account number in Czech format: 19-123457/0710 

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Account number in Czech format without first part: 123457/0710

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The IBAN will appear when you click IBAN.

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The IBAN is CZ49 0710 0000 0000 0012 3457.

How to test whether an IBAN is correct and to display it in Czech format

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Test the correctness by clicking TEST. If the number is formally correct, the calculator will also display the account number in Czech format.

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Clear the calculator by clicking RESET.

Please send any questions regarding this issue to iban.info@cnb.cz.

A calculator for the Slovak Republic is available at
https://www.nbs.sk/sk/platby/vseobecne-informacie/iban/kalkulacka-iban, 
a calculator for other countries is available at
http://www.ibancalculator.com/