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Romanian lei to Czech korunas exchange rate API

1 RON = 4.5488 CZK · Live mid-market rate

Convert RON to CZK at the mid-market exchange rate. Access real-time rates via our /api/rate endpoint (free API key required) or the developer docs.

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Exchange Rate Trend

RON → CZK
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RON to CZK Conversion Table

Convert RON to CZK

RON CZK
lei1 Kč4.55
lei5 Kč22.74
lei10 Kč45.49
lei25 Kč113.72
lei50 Kč227.44
lei100 Kč454.88
lei500 Kč2,274.40
lei1,000 Kč4,548.79
lei5,000 Kč22,743.95
lei10,000 Kč45,487.90

Convert CZK to RON

CZK RON
Kč1 lei0.2198
Kč5 lei1.0992
Kč10 lei2.1984
Kč25 lei5.496
Kč50 lei10.9919
Kč100 lei21.9839
Kč500 lei109.9193
Kč1,000 lei219.8387
Kč5,000 lei1,099.1934
Kč10,000 lei2,198.3868

About the Romanian Leu (RON)

The Romanian Leu (RON) is the official currency used in international trade and commerce.

Key Factors That Influence RON

  • Central bank monetary policy
  • Economic indicators
  • Trade balance
  • Political stability
  • Global market conditions

About the Czech Koruna (CZK)

The Czech Koruna (CZK) is used for trade and commerce in its respective region.

Key Factors That Influence CZK

  • Central bank monetary policy
  • Economic indicators
  • Trade balance
  • Political stability
  • Global market conditions

Understanding the RON/CZK Exchange Rate

The RON/CZK exchange rate tells you how many Czech korunas you get for 1 Romanian Leu. This is the mid-market rate — the real exchange rate without any markup. It's the same rate used by Google Finance.

AllRatesToday provides this rate via a free REST API, updated every 60 seconds from institutional foreign exchange market data. Integrate live RON/CZK rates into your app with our official SDKs for JavaScript, Python, PHP, and React.

The exchange rate between RON and CZK fluctuates based on supply and demand in the foreign exchange market. Economic data releases, central bank announcements, and geopolitical events can all cause significant movements in the rate.

Currency converter API for RON to CZK

The rate above comes from the AllRatesToday API. Each call below is one HTTP request that returns JSON for RON/CZK.

The live rate needs a free API key, no card required. The ECB example below needs no key at all.

Get a free API key Already registered? Copy your key from the dashboard.

Live mid-market rate

The number shown on this page, refreshed every 60 seconds across 163 currencies. Use it for pricing, checkout and anything a customer sees.

curl "https://allratestoday.com/api/v1/rates?source=RON&target=CZK" \
  -H "Authorization: Bearer art_live_your_key"

Response (live, when this page was generated):

[
  {
    "rate": 4.54879,
    "source": "RON",
    "target": "CZK",
    "time": "2026-10-27T14:08:01+0000"
  }
]

Several targets in one call return one row per pair:

curl "https://allratestoday.com/api/v1/rates?source=RON&target=CZK,EUR,GBP" \
  -H "Authorization: Bearer art_live_your_key"

No key: ECB reference rate

RON and CZK are both in the European Central Bank's daily table, so you can start without registering. Keyless, browser-safe (CORS), free for commercial use with a link back. It updates once a day, not every minute. 

curl "https://allratestoday.com/api/compat/frankfurter/latest?from=RON&to=CZK"

Response (today's table):

{
  "amount": 1,
  "base": "RON",
  "date": "2026-10-26",
  "rates": { "CZK": 4.5572532 },
  "source": "European Central Bank reference rates, served by AllRatesToday",
  "attribution": "https://allratestoday.com/migrate/",
  "free_key": "…"
}

Keyless API docs · Migrating from Frankfurter or exchangerate.host

Official central bank rate

The rate a named institution published for a date, from 122 central banks and 4 tax authorities. It never changes after publication, which is what tax filings, customs and audits require. 

curl "https://allratestoday.com/api/v1/central-bank/cnb/latest?source=RON&target=CZK" \
  -H "Authorization: Bearer art_live_your_key"

Czech National Bank: live example responses · All 126 sources · Endpoint reference

Official SDKs

npm install @allratestoday/sdk · pip install allratestoday · composer require allratestoday/sdk

For AI agents

An MCP server — @allratestoday/mcp-server — lets Claude, Cursor and other MCP clients pull these rates directly, no glue code.

Free tier

No credit card, no trial expiry. Paid plans start at €4.99/month for 5,000 requests a month.

Which one do you need? If a regulator, tax authority or auditor names the source, use the official rate — the two can differ by several percent on the same day. For everything a customer sees, use the mid-market rate. On weekends and holidays the official endpoints return the most recent published date, which is the figure compliance rules expect you to apply.

Official RON and CZK Central Bank Rates

The rate on this page is the live mid-market rate. For tax filings, customs valuations, audits, and compliant invoicing you often need the official reference rate published by the central bank instead. AllRatesToday also serves published central-bank rates as JSON, with history and a free latest-rates tier.

National Bank of Romania official rates → Czech National Bank official rates → All central banks →

How RON/CZK Exchange Rates Work

Exchange rates are determined by supply and demand in the global foreign exchange (forex) market, the largest financial market in the world with over $6 trillion traded daily.

Floating vs Fixed Rates: Most major currencies like RON and CZK have floating exchange rates, meaning their value is determined by market forces. Some currencies are pegged to another currency (usually USD) at a fixed rate.

Bid and Ask Prices: In forex markets, currencies are quoted with a bid price (what buyers pay) and ask price (what sellers receive). The mid-market rate shown on this page is the midpoint between these two prices.

Rate Fluctuations: The RON/CZK rate can change every second during trading hours. Major economic announcements, interest rate decisions, and geopolitical events can cause significant moves in either direction.

Frequently Asked Questions About RON/CZK

How do I convert RON to CZK?

To convert RON to CZK: (1) Use the calculator above to see the live mid-market rate. (2) For programmatic access, call our API: GET /api/v1/rates?source=RON&target=CZK. Current rate: 1 RON = 4.5488 CZK. Get your free API key at allratestoday.com/register.

What is 1 RON in CZK today?

1 RON equals 4.5488 CZK as of today. This is the mid-market exchange rate, which is the real rate without any bank markup. Rates fluctuate constantly based on market conditions, so check back regularly for updates.

Is the RON going up or down against CZK today?

The RON/CZK exchange rate fluctuates throughout the day based on market conditions. Today's rate is 1 RON = 4.5488 CZK. Check our historical chart above to see the trend over the past day, week, month, or year to understand whether RON is strengthening or weakening against CZK.

What is the best time to buy CZK with RON?

The best time to exchange RON to CZK depends on market conditions. Generally, rates tend to be more favorable during overlapping trading hours between major financial centers (London, New York, Tokyo). Avoid exchanging during weekends or bank holidays when spreads may be wider. Use our historical chart to identify trends and consider setting up rate alerts.

Why is RON falling or rising against CZK?

Exchange rates between RON and CZK are influenced by: interest rate differentials between central banks, inflation rates, GDP and economic growth data, trade balances, political stability, and global market sentiment. Major announcements from the Federal Reserve, ECB, or other central banks can cause significant short-term movements in the RON/CZK rate.

How can I get RON/CZK rates in my app?

Use the AllRatesToday API: (1) Register for a free API key at allratestoday.com/register. (2) Call GET /api/v1/rates?source=RON&target=CZK with your Bearer token. (3) Rates update every 60 seconds from institutional foreign exchange market data. (4) Install our official SDK for JavaScript (npm), Python (PyPI), or PHP (Packagist) for even faster integration.

What is the mid-market rate for RON/CZK?

The mid-market rate (also called the interbank rate) is the midpoint between buy and sell prices in global currency markets. The current mid-market rate is 1 RON = 4.5488 CZK. This is the "real" exchange rate without any bank markup. AllRatesToday provides this rate via a free API, sourced from institutional foreign exchange market data.

Other RON conversions

Building RON/CZK into software?

These rates come from the AllRatesToday API. If you need them in an application rather than on a page, these are the places to start:

Packages and open data