About Advanced Currency Converter

Multi-currency conversion with real-time rates and fee calculations. Part of the DevTools Surf developer suite. Browse more tools in the Calculators collection.

Use Cases

• Calculate the true cost of international wire transfers including fees
• Convert multi-currency invoices to a reporting currency for accounting
• Compare exchange rates across providers before a large international transfer
• Determine SaaS pricing in local currencies for international markets

Tips

• Enable the fee calculator to include bank transfer fees, exchange markup, and wire transfer costs — the mid-market rate rarely reflects what you actually pay
• Use the historical rate chart to see if the current rate is near historical highs or lows for the currency pair
• The multi-currency basket mode lets you convert one source amount to multiple target currencies simultaneously — useful for international pricing decisions

Fun Facts

• The foreign exchange market (Forex) is the largest financial market in the world by volume — trading approximately $7.5 trillion per day as of the BIS 2022 Triennial Survey. This dwarfs the NYSE ($25 billion/day) by over 300x.
• The euro (EUR) was introduced as an accounting currency on January 1, 1999, and physical coins/notes on January 1, 2002. It replaced 12 national currencies in 12 countries simultaneously — the largest single currency conversion in history.
• The mid-market rate (the midpoint between buy and sell rates) is what Google, XE, and Reuters show. Retail banks and money transfer services charge 1-5% above this rate as their margin — a 'hidden fee' that costs consumers an estimated $200 billion annually worldwide.

FAQ

What is the mid-market rate?

The midpoint between the buy and sell price on the interbank market. This is the 'true' exchange rate without markup. Retail conversion rates are always worse than mid-market. Services like Wise charge a transparent fee on top of mid-market rather than hiding margin in the rate.

Why does my bank offer a worse rate than XE.com?

Banks add a margin (0.5-3% for major currencies, up to 7-10% for exotic currencies) to the mid-market rate as profit. The final rate is their 'retail' rate. Specialist services like Wise, Revolut, and Western Union are typically cheaper for large transfers.

How often do exchange rates update?

Interbank rates fluctuate continuously during market hours (24/5, Sunday 5pm EST to Friday 5pm EST). Major pairs (USD/EUR, USD/GBP) move fractions of a percent per hour in normal conditions; geopolitical events can cause moves of 1-5% in minutes.