About this calculator

IBAN validity uses ISO 13616: move the country & check digits to the end, convert letters A=10…Z=35, then test mod 97 = 1. Length is country-specific (DE 22, FR 27, GB 22, IT 27, ES 24…).

Frequently asked questions

What does the IBAN Validator (EU) do?

Validate an IBAN (International Bank Account Number) using the mod-97 check. IBAN validity uses ISO 13616: move the country & check digits to the end, convert letters A=10…Z=35, then test mod 97 = 1. Length is country-specific (DE 22, FR 27, GB 22, IT 27, ES 24…).

Is the IBAN Validator (EU) free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the IBAN Validator (EU)?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified iban tools professional before committing to a purchase or a job.

What inputs does the IBAN Validator (EU) need?

Enter values for: IBAN. Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the IBAN Validator (EU) on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.