How Currency Conversion Works
Converters & Utilities
Understanding exchange rates, why the rate you see differs from what banks offer, and how to get the best deal when converting money.
What an Exchange Rate Represents
An exchange rate is the price of one currency in terms of another. When you see USD/INR at 83.50, it means one US dollar can be exchanged for 83.50 Indian rupees. Exchange rates are determined by the foreign exchange market, where currencies are traded continuously during business days. Rates fluctuate based on supply and demand, which are influenced by interest rates, inflation, trade balances, political events, and market sentiment.
Interbank Rates vs Retail Rates
The exchange rates you see on financial websites and in our currency converter are interbank reference rates. These are the rates at which banks trade large volumes with each other. When you convert money as an individual, you will not receive the interbank rate. Banks, currency exchange services, and credit card companies add a spread, typically 1 to 3 percent, as their profit margin. Some also charge flat fees. This means the actual amount you receive will be less than what the interbank rate suggests.
Why Rates Change Constantly
Exchange rates move because the relative value of currencies changes. If a country raises interest rates, its currency may strengthen because higher rates attract foreign investment. If a country experiences high inflation, its currency may weaken because each unit buys less. Political instability, trade disputes, and changes in government policy can all cause rapid shifts. During a single trading day, a major currency pair can move by 0.5 to 1 percent, and during volatile periods, much more.
Getting the Best Exchange Rate
For large conversions, compare rates across multiple providers. Banks often offer better rates than airport exchange counters, which typically have the worst rates and highest fees. Online transfer services and multi-currency cards can offer rates closer to the interbank rate. Avoid dynamic currency conversion, where a foreign merchant offers to charge you in your home currency, as this almost always results in a worse rate. If you travel frequently, consider a bank account or card with low foreign transaction fees.
Using Our Currency Converter
Our currency converter fetches live interbank reference rates from a public API and displays the last-updated timestamp. Use it for planning and estimation, not for determining the exact amount you will receive in a transaction. For actual transactions, check the rate offered by your specific provider and factor in any fees. The converter covers major world currencies and updates every few hours to balance accuracy with performance.