IBAN checker
Money & financeIs this IBAN valid?
Check an IBAN's check digits and see it in print form, part by part.
What you enter stays on your device while you use this tool. Opening a shared link sends the settings in its address to HowToolbox to prepare the page.
With or without spaces
IBAN
FI21 1234 5600 0007 85
Valid · Finland · check digits 21
Parts of the IBAN
- Country
- Finland (FI)
- Check digits
- 21
- Account number (BBAN)
- 12345600000785
- Without spaces
- FI2112345600000785
- Length
- 18
Sponsored Links
Check an IBAN's check digits and see it in print form, part by part.
How to use
- Type or paste the IBAN, with or without spaces.
- Read whether its check digits match. A valid IBAN is shown in groups of four with its parts listed below.
- If it isn't valid, compare it character by character with the original.
Sponsored Links
How it works
An IBAN (International Bank Account Number) is a bank account number in one international format: a two-letter country code, two check digits and the country's own account number. The check digits catch almost every typing mistake before money is sent to the wrong account.
To check them, the first four characters are moved to the end and every letter becomes a number (A = 10, B = 11 … Z = 35). Divided by 97, that long number must leave a remainder of 1. The method is ISO 7064 MOD 97-10, used by the IBAN standard ISO 13616.
A valid IBAN only means it is typed consistently. It doesn't prove the account exists or belongs to the person you are paying, and the length each country uses is not checked here. Your bank verifies the rest when you pay.
Worked example
How is FI21 1234 5600 0007 85 formatted for a bank transfer?
- Remove spaces: FI2112345600000785.
- The check digits are 21; the general structure and checksum pass.
FI2112345600000785. This does not verify the account or its owner.
Frequently asked questions
Can a wrong IBAN still pass the check?
Very rarely. The check catches every single mistyped character and almost every pair of swapped neighbours, but not every combination of several errors.
Does a valid IBAN mean the account exists?
No. It only shows the number is internally consistent. Only the bank can confirm the account and its owner.
Why do IBANs have different lengths?
Each country fits its own account number after the first four characters. A Finnish IBAN has 18 characters, a German one 22.
Is my IBAN sent anywhere?
No. The check runs in your browser, and the IBAN is left out of the page address and shared links.
Does this check each country’s required IBAN length?
No. It checks the general 15–34 character range and checksum, not the national length or account-number rules.
Next you might need
- Business ID checkerCheck a Finnish business ID's check digit and get the matching VAT number., private, runs on your deviceCountry-specific: FinlandMoney & financeCheckerTaxes
- Reference number generatorCreate a Finnish reference number with its check digit, or check one, with the RF form., private, runs on your deviceCountry-specific: FinlandMoney & financeGeneratorChecker
- QR and Barcode ScannerScan with your camera or an image and see what a code holds, and where a link really leads, before you open it., private, runs on your deviceMedia and filesCheckerEncoding
- JSON formatterPaste JSON to find errors, tidy it up or make it compact., private, runs on your deviceWeb & developerCheckerConverterEncoding
- Base64 encode and decodeEncode text or a file to Base64 and decode it back, right in your browser., private, runs on your deviceText toolsConverterEncoding
- Braille translatorTurn text into Unified English Braille cells and back: letters, capitals, numbers and basic punctuation., private, runs on your deviceText toolsConverterEncoding
More in Money & finance
All 38 utilities in Money & finance- Currency converterConverts between about 30 currencies with the European Central Bank's daily reference rates, and shows the day they were set., private, runs on your device
- Mortgage calculatorSee your monthly payment, total interest and how your loan shrinks over time., private, runs on your device
- Loan calculatorPayment, interest and fees of any loan: annuity or equal principal, monthly or less often., private, runs on your device
- VAT calculatorAdd VAT to a price or take it out, with the standard and reduced VAT rates of your country., private, runs on your device
- A/B test significance calculatorConversion rates, lift, p-value and the confidence interval of an A/B test, with the sample size it needs., private, runs on your device
- APR calculatorTurn the interest rate and the fees of a loan into one annual percentage rate (APR) by the EU formula., private, runs on your device
Popular now
Sponsored Links
Sponsored Links
Sponsored Links