Exchange-rate estimates versus the amount you receive
Currency conversion starts with a reference rate, but the amount received in a real transaction can be different. This page fetches a USD-based exchange-rate table from ExchangeRate-API's public endpoint when you visit. Select an amount and source and destination currencies, then convert. The displayed update time belongs to the provider's rate table, not necessarily the time of your conversion. The rates are reference estimates, not continuously streaming quotes or guaranteed bank, card or transfer-service prices.
Converting through a common base
Converted amount = amount / rate(source) × rate(destination), where both rates are units of that currency per USD. Dividing by the source rate first gives a USD equivalent; multiplying by the destination rate gives the target amount. This cross-rate method avoids needing a separate quoted pair for every possible currency combination.
For example, if an illustrative table says 1 USD = 0.80 GBP and 1 USD = 0.90 EUR, then GBP 100 / 0.80 × 0.90 = EUR 112.50. Those example rates are invented solely to demonstrate arithmetic and must not be treated as current market prices. The page supports the listed fiat currencies, not cryptocurrency trading.
Check freshness and the all-in cost
If the request fails, the page uses a static fallback table labelled as such. That fallback is not current market data. Do not use it to agree a trade, file a tax return or commit to a transfer. Check the provider update timestamp and obtain a fresh quote from the institution handling your transaction.
Banks and transfer services may apply a spread, a fixed fee, percentage charges or intermediary deductions. Compare the final destination amount for the same source budget, not just a prominently advertised exchange rate. Card networks and merchants can also use different conversion dates. Choosing your home currency at a foreign checkout can involve the merchant's conversion rather than your card issuer's rate.
A country's currency may be selected initially, but you should check the destination before converting. Results are rounded for display. Accounting and tax reporting may require a prescribed official rate or transaction-date rate rather than this reference feed.
Worked examples
Hypothetical USD to EUR
If the reference rate were 0.90 EUR per USD, USD 250 would convert to EUR 225 before fees. A USD 5 fee deducted first would leave USD 245 to convert, giving EUR 220.50 at that same rate.
Compare actual received amounts
Two providers offering different rates cannot be fairly compared without their fees. Request a quote for the same total source amount and compare the final target-currency payout and delivery conditions.
Frequently asked questions
Are these rates real-time?
No. They are a periodically updated reference table fetched on the visit. The displayed timestamp indicates the provider's latest update.
What does static fallback mean?
The live request has not supplied rates, so the calculator uses an older offline table. Verify a current rate before any financial transaction.
Why does my bank show another amount?
The bank may use another pricing time, an exchange-rate spread and transaction fees. Compare the complete quote, not only the reference rate.
Can I use the reference rate for a tax return?
Check your jurisdiction's requirements first. Tax reporting may require a prescribed official or transaction-date rate.