How Currency Exchange Rates Work

An exchange rate is simply the price of one currency expressed in another. When you see that 1 USD buys 0.92 EUR, that number is set by an enormous, decentralized global market where banks, companies, governments, and traders exchange roughly $7.5 trillion every single day.

What moves the price?

Currencies trade like any other asset: supply and demand rule. When investors want to hold a country's assets — its stocks, bonds, or businesses — they first need its currency, which pushes the price up. The biggest drivers are interest rates, inflation, economic growth, and political stability.

• Interest rates: higher rates attract foreign capital, strengthening the currency.
• Inflation: persistently high inflation erodes purchasing power and weakens a currency.
• Trade balance: countries that export more than they import create natural demand for their currency.
• Central bank policy: banks can buy or sell their own currency to steer its value.

Floating vs. pegged currencies

Most major currencies — the dollar, euro, pound, and yen — float freely, meaning the market sets their value. Others are pegged: the central bank fixes the rate to another currency and intervenes to hold it there. Some currencies, particularly in economies with limited foreign reserves, trade in narrow managed bands or through official windows, which is why rates for pairs like USD to NGN or USD to CDF can differ between official and parallel markets.

Why the rate you see online differs from the rate you get

The rate shown by converters like ours is the mid-market rate — the midpoint between what buyers pay and sellers receive. Banks and exchange services add a margin (the spread) on top. When converting money for real, always compare the offered rate against the mid-market rate to see the true cost.

How to compare a transfer quote

First calculate the destination amount using a reference rate, then compare it with the amount your recipient would actually receive after fees. If a provider advertises zero fees but gives a less favorable exchange rate, the difference is still a cost. For example, on a 1,000-unit transfer, a 2% rate markup can cost 20 units before any separately listed fee. Always compare the delivered amount, not just the headline rate.

A rate timestamp matters too. Currency markets can move between the time you check a converter and the moment you confirm a transfer. For less frequently traded currencies, official and local cash-market rates may diverge, so verify the final quote in the channel you plan to use.