A nominal exchange rate is the price of one currency in another. A real exchange rate adjusts that price for differences in domestic and foreign price levels. The two measures answer different questions: one helps convert money, while the other helps compare the relative cost of goods and services.
Nominal rates are the quotes you see
In EUR/USD, the nominal rate tells you how many US dollars are quoted for one euro. It is a bilateral rate because it compares two currencies. A currency rates table and an indicative currency conversion use nominal rates to show prices and amounts.
Real rates adjust for prices
Imagine the nominal exchange rate stays unchanged for a year, but prices rise faster in one country than in the other. The relative cost of the two countries’ goods has changed even though the quoted currency rate has not. A real exchange-rate measure combines the nominal rate with price levels or price indices to capture that difference.
The exact formula depends on the quote convention and index used. A real exchange rate is not a direct quote you can usually transact at. Economists use it to study relative prices, purchasing power and trade competitiveness, with care about how the measure is constructed.
Real effective rates use a basket
A real effective exchange rate (REER) combines bilateral rates against several trading partners, often weighted by trade, and adjusts for relative inflation. It gives a broader view than comparing a currency only with the US dollar. The IMF’s guide to real exchange rates explains the distinction between nominal, real and real effective measures.
Different indexes can use different weights, price measures and base years. A REER increase is not automatically evidence that a currency is overvalued: productivity, trade composition, transport costs and structural changes can all influence relative prices.
Use nominal rates for conversions and transactions. Use real or real effective measures when the question is how relative prices have changed across economies. The measures complement each other, but they are not interchangeable.
