Currency Converter

Understanding Exchange Rates and Currency Conversion

An exchange rate is the price of one currency in terms of another. When EUR/USD = 1.08, one euro buys 1.08 US dollars. Rates move continuously in the foreign exchange market, driven by interest rates, inflation, trade, geopolitics, and flows in capital.

Travelers and businesses care about the mid-market (interbank) rate versus retail rates. Mid-market is the midpoint you often see on data sites; banks and bureaus add a spread. Comparing to mid-market helps judge if a quoted rate is fair.

Practical tips: cards without foreign transaction fees often convert near mid-market; when abroad, pay in the local currency instead of “dynamic” home-currency conversion. For large transfers, specialist brokers may beat bank spreads. Use this tool as a quick estimate, then confirm live rates before big transactions.

Live vs manual rates: live FX feeds can lag, exclude weekends, or reflect interbank mid-market prices—not necessarily the rate a retail kiosk applies. When you need travel budgeting, add a conservative cushion (1–3%) or enter the walk-in rate you actually expect.

Triangular logic: if you know A→USD and USD→B, you can derive A→B. This tool pairs currencies directly; when an API fails, paste a trusted bank rate for seriousness in tax or invoice prep.

Pairs with: percentage calculator for fee impact, loan tools for cross-border mortgages, or compound interest for FX-denominated investments.

Where the rates come from

Live rates are the European Central Bank’s euro reference rates, fetched through the Frankfurter API and cached for up to an hour. The ECB publishes them once per working day, around 16:00 Central European Time, so the rate does not move during the day and stays at Friday’s value over the weekend. Cross rates such as USD to JPY are derived from the two euro rates. If you switch off live rates, you can type in any rate yourself — useful for matching a bank statement or an invoice.

What you will actually pay

Reference rates are mid-market rates; consumers almost never get them. Suppose €1,000 is worth $1,080 at the reference rate. A card with a 3% foreign transaction fee charges about $1,112.40. Accept “pay in your home currency” at a foreign terminal (dynamic currency conversion) and a 5% markup makes it $1,134.00 — so when a card terminal abroad offers a choice, pick the local currency.

• Cards without foreign transaction fees typically come closest to the reference rate.
• Airport and hotel exchange desks usually have the widest spreads.
• For large transfers, compare the amount that will arrive, not the advertised fee — a “no fee” transfer can hide its cost in the rate.

Quick reverse calculations

To convert the other way, swap the two currencies, or divide by the rate: if 1 EUR = 1.08 USD, then 1 USD = 1 ÷ 1.08 = 0.9259 EUR. Results are shown to two decimal places; for currencies with no everyday minor unit, such as the Japanese yen and Korean won, round to whole units.

Rates for accounts, taxes and invoices

Tax authorities and auditors usually require a specific source — the central bank of your country, your tax authority’s published monthly rates, or the rate on the actual transaction. ECB rates are an official source in the euro area, but check which one your tax return or contract specifies, and record the date of the rate you used.