Currency exchange rates change constantly throughout the trading day, so rather than display a number that could be stale or wrong by the time you use it, this calculator asks you to enter the current exchange rate yourself — from your bank, card provider, or a live rate source — and handles the multiplication instantly and accurately.
The formula
To convert $100 USD to EUR at a rate of 0.92: 100 × 0.92 = €92.00.
Where to find a current exchange rate
Exchange rates vary slightly between sources and include a spread (markup) when used for actual currency exchange. For a reliable reference (not necessarily what a bank will offer you), central bank websites, or your bank/card provider's app, are good starting points before entering the rate here.
Worked examples
| Amount | Rate | Result |
|---|---|---|
| 500 | 1.09 | 545.00 |
| 1,000 | 0.79 | 790.00 |
| 250 | 151.5 | 37,875.00 |
See our conversion guide for why exchange rates constantly change and how to keep a conversion accurate.
Common mistakes
- Using an outdated rate. Exchange rates move throughout the day — always check the rate is current before relying on a conversion for a real transaction.
- Ignoring fees and spreads. Banks and card providers typically apply a markup above the "mid-market" rate you see quoted publicly — the amount you actually receive or pay may differ from a pure mathematical conversion.
- Converting in the wrong direction. Make sure the rate you enter matches the direction of conversion you intend (e.g., USD→EUR vs. EUR→USD are reciprocal, not the same number).
Frequently asked questions
Why do I have to enter the exchange rate myself?
Exchange rates change continuously throughout the trading day. Rather than risk showing you a stale or inaccurate rate, this tool lets you enter a current rate from a trusted source so the conversion is accurate at the moment you need it.
Where can I find a reliable exchange rate?
Central bank websites, your bank or card provider's app, or well-known financial data providers are good starting points, though the exact rate you receive in a real transaction may include additional fees or spread.
Why does my bank give me a different amount than this calculator?
Banks and card providers typically apply a markup (spread) above the market exchange rate, plus sometimes a flat fee, so the amount you actually receive is often less favorable than a pure mathematical conversion.