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Currency Conversion Guide — Exchange Rates, Travel Money & Forex Tips
Currency conversion is essential for international travel, online shopping, freelance invoicing, and global investing. Understanding how exchange rates work helps you get the best value.
What Is a Mid-Market Rate?
The mid-market rate (also called the interbank rate) is the midpoint between the buy and sell prices in global forex markets. This is the "real" exchange rate you see on Google or Reuters. Banks and exchange bureaus add a spread (typically 1–4%) on top — this is their profit margin.
How to Get the Best Exchange Rate
Best options ranked: (1) Wise/Revolut — closest to mid-market, small fixed fee. (2) ATM abroad using your home bank card — usually good rates but check foreign transaction fees. (3) Credit card with no foreign transaction fee — Visa/Mastercard use near-market rates. (4) Airport exchange bureaus — usually worst rates (5–10% spread). (5) Hotel desks — avoid entirely.
Major Currency Groups
Major pairs (highest liquidity): EUR/USD, USD/JPY, GBP/USD, USD/CHF, USD/CAD, AUD/USD, NZD/USD. Emerging market: INR, BRL, MXN, ZAR, TRY — higher volatility. Pegged currencies: AED, SAR, HKD — fixed to USD.
Currency Codes (ISO 4217)
Every currency has a 3-letter ISO code: USD (US Dollar), EUR (Euro), GBP (British Pound Sterling), JPY (Japanese Yen), CAD (Canadian Dollar), AUD (Australian Dollar), CHF (Swiss Franc), CNY (Chinese Yuan). Always use these codes to avoid ambiguity — "dollar" could mean USD, CAD, AUD, NZD, SGD, or HKD.