Currency Converter
Auditable snapshots • lock vs latest • offline-first • opt-in web fetch • interactive rate chart.
SNAPSHOT
RESULT
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RATE CHART
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Drag = pan • Wheel/pinch = zoom • Hover = inspect • Double-click = reset
How the Currency Converter works
Convert currencies using a stored FX snapshot (base currency + rates). Use it to learn and estimate scenarios — then verify final rates from official or trusted sources.
Note: Educational use only. FX rates can change rapidly and real conversions include spreads, fees, cutoffs, and bank/issuer rules. Do not rely on this for trading or payments.
Quick steps
- Select the source and target currencies.
- Enter an amount to convert.
- Review the exchange rate and converted amount.
- Use results for education only and cross‑verify with a trusted live rate source when it matters.
- Rates come from a snapshot dataset (not necessarily real-time).
- Conversions are computed via the snapshot base currency.
- Explain panel shows the rate path and the snapshot provenance.
- History helps you compare multiple conversions quickly.
Base currency + cross rates
Snapshots store rates relative to a base currency (for example: USD).
To convert A→B, the calculator may compute a cross rate through the base.
Why your bank may differ
- Banks and card networks add spreads and fees.
- Posting dates and cutoffs can shift the applied rate.
- Some currencies have controls or multiple published rates.
Privacy
Conversions run locally in your browser.
If you enable “Remember inputs”, values are stored only on this device.
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