Currency Converter
Convert between currencies using live rates from free public APIs. All calculations are performed in your browser.
Live FX
API
Client-side
Last updated: —
Source: open.er-api.com
Inputs
Fetch rates and convert instantly
Cross-rate math is done locally
Result
Initializing…
Converted Amount
—
Rate (From → To)
—
Inverse (To → From)
—
Disclaimer: Rates are for reference only and may differ from your bank or card provider.
How it works
- On load, the tool fetches USD-based rates from
open.er-api.com
. - Select currencies and enter an amount — conversion happens instantly.
- You can refresh rates at any time or swap the currency directions.
- Cross-rate formula:
rate(from→to) = rates[to] / rates[from]
, using a single base table. - Rates are cached locally for 12 hours to minimize API calls.
- Fallback providers:
exchangerate.host
,frankfurter.app
.
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