What does the Currency Converter do?

Convert any world currency using daily reference exchange rates.

How do I use the Currency Converter?

Enter the requested values using the units shown, choose the options that match your case, calculate the result and review the displayed formula or working before using the answer.

Which formula does the Currency Converter use?

The formula or calculation method is shown on the page together with the result. Review the displayed steps and units for the exact method used by this tool.

How should I check a Currency Converter result?

Verify the input values and units first, then compare the result with the displayed calculation steps, assumptions, warnings and any cited reference that applies to your use case.

What are the limitations of the Currency Converter?

The result depends on the values, units and assumptions entered. Treat it as a calculation aid and use the applicable official document, manufacturer data or qualified professional review when the decision requires one.

Where can I find related tools?

Use the related-tools links on the page or browse the Unit Converters collection for another calculation method or supporting tool.

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Currency Converter

Daily reference rates with source timestamp and optional fee estimate

Loading rates…

From

US Dollar

Euro

Exchange rate

1 USD = — EUR

100 USD = — EUR

Estimate an amount after fees

Optional estimate: deduct the fixed fee in USD first, then apply the percentage fee to the remaining USD amount. The daily reference rate is then applied. Your provider may use a different spread, fee order or rounding rule.

Fixed fee (USD)Percentage fee (%)

Loading the daily reference rate…

The rate is informational and is not an executable bank, card or remittance quote. Zero fees do not mean your provider has no exchange-rate spread.

Popular USD rates

How to use the currency converter

1Enter the source amount using a decimal point. Grouped thousands such as 1,000 are supported; omit the currency symbol.
2Select the source and target ISO 4217 currency codes, then confirm the currency names shown below them.
3Read the converted amount together with the displayed rate and update timestamp.
4For a payment or transfer, compare the result with the provider's quoted customer rate and fees.

Formula and worked example

Cross-rate = USD rate for EUR ÷ USD rate for USDConverted amount before fees = amount × cross-rate

With the current selections, the engine uses the next available EUR per USD. With the fee settings above, the amount after fees is — USD; applying the reference rate gives — EUR. Both source rates come from the same USD-based response, so dividing them creates the USD/EUR cross-rate.

Rate source, timing and limitations

Rates are supplied by the ExchangeRate-API open-access endpoint and are reference rates, not a guaranteed bank, card, cash or remittance quote. The provider documents that this open endpoint updates once per day. OneCalcApp shows the timestamp returned by the feed; weekends, holidays and market closures can make the latest available reference older than the current clock time.

Real customer amounts may differ because of bid/ask spreads, service fees, card mark-ups, taxes and rounding. For a time-critical or regulated transaction, obtain an executable quote directly from the institution.

Rates by ExchangeRate-API · Rate feed currently unavailable