Currency Converter

What Is a Currency Converter?

A currency converter calculates how much one currency is worth in another, using the current exchange rate. For example, if 1 USD = 84 INR, then 100 USD = 8,400 INR. The exchange rate itself fluctuates continuously based on global supply and demand in the foreign exchange (forex) market — the largest financial market in the world, trading over $7 trillion per day.

Exchange rates are influenced by dozens of macroeconomic variables: central bank interest rate decisions, inflation differentials between countries, trade balances, political events, commodity prices and market sentiment. Major currency pairs like EUR/USD and USD/JPY can move by fractions of a percent in minutes during data releases or geopolitical events.

Unitafy's currency converter uses mid-market rates — the midpoint between what buyers and sellers trade at in the interbank market. This is the fairest reference rate for comparison. When you actually exchange money at a bank or bureau de change, you will receive a rate slightly worse than mid-market due to their spread and fees.

How to Use the Currency Converter

1. Enter the amount — type the amount you want to convert in the Amount field. The default is 1.
2. Select the source currency — use the From dropdown to select your source currency (e.g. USD for US Dollars).
3. Select the target currency — use the To dropdown to choose your target currency (e.g. INR for Indian Rupees).
4. Read the result — the converted amount appears instantly in the Result field, along with the live exchange rate shown below.
5. Swap currencies — click the ⇄ button to instantly swap the From and To currencies and see the reverse rate.
6. Check the trend chart — the 7-day trend chart shows whether the rate has moved up or down recently, giving useful context for the current rate.

Exchange Rate Formula

Currency conversion uses a simple cross-multiplication formula. All rates are expressed relative to a base currency (usually USD in our system):

Cross rates explained

When converting between two non-USD currencies (e.g. EUR to GBP), the converter calculates a cross rate by routing through USD. EUR → USD → GBP. This is called a cross-currency rate. Most published exchange rate tables show rates against USD, so cross rates are derived rather than directly quoted.

Inverse rate

If 1 USD = 84 INR, then 1 INR = 1/84 = 0.0119 USD. The inverse rate is always 1 divided by the forward rate. The converter shows both the forward and inverse rate below the result field, so you can see both directions at once.

Approximate Common Currency Rates

Indicative reference rates (approximate — use the live converter above for accurate current rates):

* Rates are approximate and change daily. Use the live converter above for accurate current rates.

Worked Examples

Example 1: Travel budget in Europe

You have $2,000 USD for a trip to Europe. At an approximate rate of 1 USD = 0.92 EUR, your budget converts to 2,000 × 0.92 = 1,840 EUR. However, a bank or exchange bureau may offer 0.88 EUR per dollar after fees, giving you only 1,760 EUR. The difference (80 EUR) represents the cost of currency exchange — so comparing providers matters for large amounts.

Example 2: International salary comparison

A software developer earns $120,000 USD in the US. A comparable role in the UK pays £85,000 GBP. At 1 GBP = 1.27 USD, the UK salary is equivalent to £85,000 × 1.27 = $107,950 USD. Cost of living differences also matter significantly for real purchasing power comparisons.

Example 3: Remittance calculation

Sending 500 AED from UAE to India: at 1 AED ≈ 22.9 INR, the recipient gets approximately 500 × 22.9 = 11,450 INR. Transfer service fees (typically 0–3%) and exchange rate spreads (0.5–2%) affect the actual received amount, so comparing Wise, Remitly, or bank wire costs before sending is worthwhile.

Tips for Getting the Best Exchange Rate

• Use online transfer services — Wise (formerly TransferWise) and Revolut offer rates very close to the mid-market rate with transparent, low fees — significantly better than most banks.
• Avoid airport exchange booths — airport currency exchanges typically have the widest spreads (worst rates). The convenience premium can cost 5–10% of your exchange amount.
• Use your debit card abroad — most modern debit cards (especially Wise, Monzo, Revolut) charge near mid-market rates for international transactions, beating cash exchange desks.
• Check the rate before remitting — for large international transfers (salary, property), even a 0.5% rate difference on $50,000 is $250. Comparing providers takes 5 minutes and can save significantly.
• Watch for "no fee" traps — a service advertising zero fees often makes up for it in the exchange rate spread. Always check the effective rate you receive, not just the headline fee.
• Avoid dynamic currency conversion (DCC) — when paying by card abroad, always choose to pay in the local currency (not your home currency). DCC rates are typically 3–7% worse than your bank's rate.
• USD is the global reserve currency — when converting between two exotic currencies, USD is often the most efficient intermediate step. Our converter handles this automatically via cross rates.

Related Tools

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