EUR/USD measures how many US dollars one euro buys. It is the most heavily traded currency pair in the world, accounting for the largest share of daily global FX turnover, and it serves as the benchmark for the relative value of the world's two largest reserve currencies.
The pair is driven above all by monetary-policy divergence between the European Central Bank (ECB) and the US Federal Reserve: when the Fed is tighter than the ECB, the dollar tends to strengthen and EUR/USD falls, and vice versa. Relative growth, inflation, and rate expectations on each side of the Atlantic are the core inputs.
Because it is so deep and liquid, EUR/USD typically carries the tightest spreads in the market and is the reference many other pairs are triangulated from. It also trades as a broad dollar-strength and risk barometer during periods of global stress.
This page shows an indicative mid-market EUR/USD rate that updates intraday through the trading week. Every API response carries a source and market_session field, so you always know how fresh a quote is. Rates are indicative only, not for settlement or regulated trading.
Frequently asked questions
What does EUR/USD measure?
EUR/USD states how many US dollars you receive for one euro. A rate of 1.0850 means one euro buys 1.0850 US dollars.
Is EUR/USD a live rate on exchangerate.dev?
EUR/USD is one of the source-labeled intraday pairs — it can update through the trading week. Every API response includes source and market_session so you know whether a given quote was a live tick or a daily reference fix.
What drives EUR/USD the most?
Monetary-policy divergence between the ECB and the US Federal Reserve is the dominant driver. When the Fed holds rates higher than the ECB, the dollar tends to strengthen and EUR/USD falls; the reverse tends to lift it. Relative growth and inflation feed those rate expectations.
Why is EUR/USD the world's most-traded pair?
It pairs the two largest reserve currencies, so it has the deepest liquidity and the tightest spreads in the market. That depth also makes it the reference from which many other currency pairs are triangulated.
Is EUR/USD used to derive other rates?
Yes. Many crosses that are not directly quoted are triangulated from EUR/USD and a second pair, which is why a move in EUR/USD ripples across a wide range of other rates.
How do I get the EUR/USD rate via the API?
GET /v1/latest/EUR?symbols=USD returns the indicative rate along with source, market_session, and timestamp. The reverse (USD as base) is also supported. The free tier covers it, no credit card required.
Is EUR/USD suitable for settlement or trading decisions?
No. exchangerate.dev provides indicative rates for reference and informational use only — not for settlement, regulated trading, or as a source-of-record price.