Česká národní banka (CNB) — currency rates
Daily exchange rates published by Česká národní banka. Calculator below uses the bank's rate for the date you pick, with previous-business-day fallback for invoicing and tax filings.
Czech National Bank
Jednotný kurz — Czech yearly-average rate
Czech accounting allows two methods: the daily ČNB fix or the year-end 'jednotný kurz' (single rate). The latter is the year's average and is published in late December/early January for the just-finished year. exrate exposes the daily ČNB rate plus full historical archive — sufficient for both methods.
How CNB sets the rate
ČNB fixes mid-rates daily from interbank market quotes. Effective from 14:30 Prague time onwards; the same rate applies until the next business day's fix.
Update schedule
Mon–Fri ~14:30 Europe/Prague. Czech bank holidays observed.
Programmatic access
GET https://api.banks-rates.com/v1/rate?bank=CNB&date=YYYY-MM-DD&from=USD&to=CZK&amount=100.
Frequently asked questions
Where do you get CNB rates?
Directly from Česká národní banka's published feed — no intermediate provider. The exact source URL is documented on the About page.
Is your data delayed?
We ingest within minutes of publication. The visible 'last updated' timestamp on this page is the source-of-truth.
Do you cover historical rates for CNB?
Yes — back to each bank's earliest archive. Use the calculator with a past date or the /v1/rates/series API endpoint.
Is there an API for CNB rates?
Yes: GET /v1/rate?bank=CNB&date=YYYY-MM-DD&from=USD&to=CZK&amount=100. See /en/api/ for full reference.
What if the date I want is a weekend or holiday?
The calculator transparently falls back to the previous business day rate, which is the legally correct value for invoices and tax filings under most EU rules.
Can my AI assistant query CNB rates?
Yes — connect Claude / Cursor / ChatGPT to mcp.banks-rates.com. See /en/mcp/ for setup.