Currency Calculator Guide: Exchange Rates, Forex Basics, and Travel Tips

How Exchange Rates Work

An exchange rate is the price of one currency expressed in terms of another. If 1 USD = 0.92 EUR, one US dollar buys 92 Euro cents. Exchange rates fluctuate continuously in the global foreign exchange (forex) market, the world's largest financial market with over $7 trillion traded daily. The rate you see in the news is the mid-market rate — the midpoint between buy and sell rates used by banks.

What Drives Currency Values

Currency values respond to multiple economic forces:

• Interest rates: Higher rates attract foreign investment, increasing demand for the currency.
• Inflation: Lower inflation preserves purchasing power and typically strengthens a currency.
• Economic growth: Strong GDP growth signals a healthy economy, increasing currency demand.
• Political stability: Uncertainty and instability reduce investor confidence, weakening a currency.
• Trade balance: Countries exporting more than they import tend to have stronger currencies.
• Central bank policy: Quantitative easing increases money supply, typically weakening the currency.

Getting the Best Exchange Rate

The spread between the mid-market rate and the retail rate you receive is where conversion costs hide. Airport currency exchanges typically offer 10–15% worse than mid-market. Bank wire transfers often charge 3–5% spread plus fees. Credit cards with no foreign transaction fees typically offer rates within 1% of mid-market. Specialist services like Wise (formerly TransferWise) typically offer rates within 0.5–1% of mid-market for international transfers.

Frequently Asked Questions