Global Currency Converter.
Fast, accurate, and free currency conversion powered by open exchange rate data feeds. Check mid-market rates for over 150 global currencies.
Indicative Mid-Market Rates: Exchange rates shown are indicative mid-market estimates for informational purposes and comparison, sourced from open financial data feeds. Commercial rates offered by banks and remittance services include retail markups and transaction fees.
Popular Currency Conversions
Daily mid-market rates, conversion cheat-sheets, and fee comparisons for major pairs.
Client-Side Privacy
Conversions compute locally in your browser. Your entered financial values and amounts are never transmitted to our servers or saved.
Mid-Market Benchmarks
Exchange rates are sourced from open institutional data providers (ExchangeRate-API), representing wholesale mid-market reference rates without retail spreads.
Cached & Transparent
Rates update daily at 00:00 UTC and cache locally for 1 hour, reducing unnecessary network requests while maintaining reliable reference timestamps.
Got Questions?
Frequently Asked Questions
Information regarding foreign exchange rates, data providers, calculation methods, and privacy.
Where do the exchange rates come from?
Exchange rates are retrieved from ExchangeRate-API (open.er-api.com), an open financial data feed that aggregates central bank benchmarks and global foreign exchange market quotes.
How often are currency exchange rates updated?
Exchange rates are updated once daily at 00:00 UTC from open financial data feeds (ExchangeRate-API). To optimize speed and avoid redundant network calls, fetched rate tables are cached in your browser's local storage for 1 hour. Each conversion displays the exact last-updated timestamp provided by the API.
How are currency conversions calculated?
Conversions use the cross-rate formula: Converted Amount = Input Amount × (Rate_to / Rate_from), where Rate_to and Rate_from represent the benchmark values relative to the base currency. All arithmetic runs client-side in JavaScript.
Why do bank and card exchange rates differ from these numbers?
Advance Converter displays mid-market benchmark rates (the midpoint between wholesale buy and sell quotes). When you exchange funds at a retail bank, kiosk, or credit card processor, the financial provider adds a retail markup (typically 1% to 5%) and processing fees on top of the mid-market rate.
What data is transmitted when I use the currency converter?
The only external data request is an HTTP GET call to open.er-api.com to download the currency rate table. This request contains only the three-letter currency code in the URL path. Your conversion amounts, calculation results, and personal information are never sent to external servers or analytics providers.
Can I use these rates for commercial transactions?
No. The rates provided are indicative estimates for comparison, travel planning, and educational purposes. Because forex trading is continuous, you should verify final transaction terms and retail fees directly with your bank or money transfer service before sending funds.
How to Use Our Free Currency Converter
Converting currencies with ADVANCE CONVERTER is fast and simple. Enter the amount you wish to convert in the input field, select your source currency from the dropdown menu on the left, and choose your target currency on the right. The conversion happens automatically using live mid-market exchange rates sourced from open financial data feeds. Click the swap button to instantly reverse the conversion direction — perfect for quickly checking both sides of a currency pair like USD to EUR and EUR to USD.
What Are Mid-Market Exchange Rates?
Mid-market rates — also called interbank rates — represent the midpoint between the buy and sell prices of two currencies on the global foreign exchange market. They represent the midpoint between global buy and sell quotes and serve as an objective benchmark across global currency markets. Our currency converter displays these indicative mid-market rates so you can see the baseline value of your money before banks, credit card companies, or money transfer services add their markup.
Why Rates Differ From Your Bank
When you exchange currency at a bank, airport kiosk, or through a credit card transaction, the rate you receive typically includes a markup of 1% to 5% above the mid-market rate. This is how financial institutions earn revenue on foreign exchange transactions. By comparing the mid-market rate shown on our converter with your bank's offered rate, you can calculate exactly how much markup you're paying and make informed decisions about where to exchange your money.
Popular Currency Pairs
The most frequently converted currency pairs on our platform include USD to EUR (US Dollar to Euro), GBP to USD (British Pound to US Dollar), USD to INR (US Dollar to Indian Rupee), USD to CAD (US Dollar to Canadian Dollar), AUD to USD (Australian Dollar to US Dollar), and EUR to GBP (Euro to British Pound). Our converter supports over 150 world currencies, including major currencies, emerging market currencies, and regional pairs.
Exchange Rate Provider & Calculation Methodology
We believe users deserve complete clarity on where financial numbers come from and how calculations are performed:
📡 Data Source & Provider
Exchange rate tables are provided by ExchangeRate-API (open.er-api.com). Rates reflect aggregated mid-market quotes updated daily at 00:00 UTC.
💾 Local Caching & Refresh
Rates are cached in your browser's localStorage for 1 hour. This prevents repetitive network queries while keeping timestamps visible with every calculation.
📐 Cross-Rate Math Formula
Converted = Amount × (Rate_target / Rate_base)
Calculated using institutional base exchange tables without applying retail spreads or commissions.
🔒 Data & Privacy Disclosures
The only outbound request is a GET call to retrieve rates for the selected currency. Your input amounts and calculation outputs are never transmitted to our servers or third-party analytics.