Currency Exchange Guide: Exchange Rates, Cross Rates & How to Get the Best FX Deal
Exchange rate × amount = converted value. Learn about mid-market rates, bid-ask spreads, cross rates, and why airport exchanges charge 10–15% more than the market rate.
How Exchange Rates Are Quoted
Exchange rates express the price of one currency in terms of another. EUR/USD = 1.0850 means 1 Euro costs 1.085 US Dollars. The first currency (EUR) is the base; the second (USD) is the quote/counter currency. To convert EUR to USD: multiply by the rate. To convert USD to EUR: divide by the rate (or multiply by 1/rate). Major currency pairs (most l
The Bid-Ask Spread: Your Invisible Fee
Every currency exchange has two prices: the bid (what the bank buys the base currency for) and the ask (what the bank sells it for). The spread between them is the dealer's profit margin. Bank retail spread example: mid-market EUR/USD = 1.0850. Bank sells EUR to you at 1.0650 (ask), buys EUR from you at 1.0500 (bid). If you buy €1,000: at mid-marke
Cross Rates: Converting Between Non-USD Pairs
A cross rate is an exchange rate between two non-USD currencies, derived from each currency's rate against the USD. Most currencies are quoted against the USD, so to find a EUR/GBP rate: EUR/GBP = EUR/USD ÷ GBP/USD = 1.0850 ÷ 1.2700 = 0.8543. This means 1 Euro = 0.8543 British Pounds. Worked example: You want to convert €5,000 to Japanese Yen (JPY)
Where to Exchange Currency for the Best Rate
Best options by use case: For international travel: use a no-foreign-transaction-fee debit card at local ATMs (Charles Schwab, Wise debit card, Capital One 360). Withdraw larger amounts less frequently to minimize ATM fees. Avoid dynamic currency conversion (DCC) — always choose to pay in the local currency when given an option at checkout or ATM.
Frequently Asked Questions
Why is the exchange rate different at different places?
Every exchange provider marks up the interbank (mid-market) rate to earn their profit — rather than charging explicit fees, they offer you a worse rate. The size of the markup varies from 0.4% (Wise) to 15% (airport kiosk). When comparing options, always convert both rates to per
What is dynamic currency conversion (DCC) and should I use it?
DCC is the option offered at ATMs and payment terminals abroad to charge you in your home currency instead of the local currency. While it seems convenient, it uses the merchant's exchange rate (typically 3–8% above mid-market) rather than your card issuer's rate. Always decline
How much cash should I bring for international travel?
Keep 20–30% of your travel budget as local cash for small vendors, tips, and places that don't accept cards. Use a no-foreign-transaction-fee card for larger purchases. Local ATMs almost always provide better rates than airport exchanges. In most developed countries, you need les
Is it better to exchange money before or after international travel?
For major currencies (EUR, GBP, JPY, CAD): ATM withdrawals at destination give better rates than pre-trip exchange at US banks. Exception: countries with poor ATM infrastructure, currency controls, or official vs black market rate discrepancies (Argentina, Cuba, Venezuela) where
How do exchange rates affect international business?
For US companies with foreign revenue: a strengthening dollar means foreign revenue is worth less when converted. A $1M EUR contract becomes $1.08M at EUR/USD 1.08 or $1.05M at 1.05 — a $30,000 difference with only a small rate move. Businesses use forward contracts, options, and