IBAN from account number — Slovak converter.
Convert an old Slovak account number (prefix-number/bank code) to an international IBAN in a second. The result is mathematically verified by ISO 13616 mod-97. No signup, nothing is sent anywhere — everything runs in your browser.
Pri kopírovaní zo starého výpisu obvykle uvidíte tvar 19-8742637541/1200 — predčíslie (pred pomlčkou) a číslo účtu (medzi pomlčkou a lomkou). Lomka oddeľuje kód banky.
Doplňte zostávajúce polia
Zadajte aspoň číslo účtu a kód banky.
Výpočet je čisto matematický (ISO 13616). Pred odoslaním platby na väčšiu sumu IBAN vždy overte cez bankový internet-banking — slovenské banky vám pri zadaní platby zobrazia meno príjemcu.
24 characters, 4 fields, one check.
Conversion from the old format is no magic — a Slovak IBAN exactly mirrors the original account number, only aligned and topped with an internationally verifiable checksum.
The algorithm is defined by ISO 13616 and ECBS EBS204. The Slovak details are described by the National Bank of Slovakia.
- SK
Country code (2 letters)
Fixed identifier for the Slovak Republic. Always „SK“ for any Slovak bank account.
- 31
Check digits (2 digits)
Computed from BBAN per ISO 13616 mod-97. Our converter generates them itself — you never enter them.
- 1200
Bank code (4 digits)
Assigned by the NBS. 0900 = SLSP, 0200 = VÚB, 1100 = Tatra, 7500 = ČSOB. In the old account number it sits after the slash.
- 000019
Prefix (6 digits, padded with zeros)
A historical client identifier within the bank. Modern accounts don't have one — the field is padded with zeros.
- 8742637541
Base account number (10 digits, padded with zeros)
The actual account number. If shorter than 10 digits, it's left-padded with zeros. This is „8742637541“ from the NBS example.
Embed code for your site.
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<div style="max-width:560px;margin:0 auto">
<iframe src="https://1faktura.sk/nastroje/iban-z-cisla-uctu/embed" width="100%" height="520" style="border:0;border-radius:16px" title="IBAN from account number – 1FAKTURA" loading="lazy"></iframe>
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<a href="https://1faktura.sk/nastroje/iban-z-cisla-uctu" target="_blank" rel="noopener">IBAN from account number</a>
· <a href="https://1faktura.sk/slovnik/iban" target="_blank" rel="noopener">1FAKTURA</a>
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</div>Embed preview: /nastroje/iban-z-cisla-uctu/embed
IBAN validator
Validate any European IBAN per ISO 13616. For Slovak IBANs we also show the bank and BIC.
Open the validator →Related · VATVAT calculator
Compute Slovak VAT (23 %, 19 %, 5 %, 0 %) from net or gross amounts. Also embeddable.
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about Slovak IBAN.
Something doesn't add up? Write to us — we'll reply within 4 hours on a business day.
info@1faktura.skHow is a Slovak IBAN composed?+
What do I do if I don't have a prefix?+
What's the difference between IBAN and BIC?+
Why does the yellow „NBS checksum failed“ warning appear?+
Does the converter work for every Slovak bank?+
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Is it safe? Is my data sent anywhere?+
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