# Convertitore di valute

> Converti tra 160 valute con gli ultimi tassi di riferimento giornalieri, la data del tasso e un grafico storico di 90 giorni.

Versione interattiva: https://www.calcopenly.com/it/finance/currency-converter
Argomento: Calcolatori finanziari

Convert an amount between about 160 currencies at the latest daily reference rates. Rates come from the ExchangeRate-API open-access feed, with the European Central Bank's reference rates (via Frankfurter) as the fallback; the page shows which source and date it used.

The conversion itself is computed in 50-digit decimal from the two currencies' rates against the US dollar, and the result is rounded to the target currency's minor unit (two decimals for most, none for the yen). A quick-reference table lists common amounts in both directions, and a chart shows the last 90 days for currency pairs the ECB publishes.

These are mid-market rates. Banks and card networks add a margin, so the amount you are charged will usually be lower than shown.

## Dati

- **Amount**
- **Da**
- **A**
- **Rate (1 from = ? to)**

## Risultati

- Converted — risultato principale
- Inverse rate

## Esempi svolti

### 100 at 83.5

- Amount: 100
- Da: USD
- A: INR
- Rate (1 from = ? to): 83.5
- **Converted: 8,350.00**
- **Inverse rate: 0.011976**
- Fonte di verifica: 100 × 83.5; 1/83.5

### Zero amount

- Amount: 0
- Da: USD
- A: INR
- Rate (1 from = ? to): 1.1
- **Converted: 0.00**
- Fonte di verifica: 0 × rate

### Half-cent rounding

- Amount: 3
- Da: USD
- A: INR
- Rate (1 from = ? to): 0.335
- **Converted: 1.00**
- **Inverse rate: 2.98507**
- Fonte di verifica: 3 × 0.335 = 1.005 → 1.00 half-even; 1/0.335

## Domande

### How often are the exchange rates updated?

The rate feed updates once a day, and the page shows the time of the last update. The app keeps the most recent rates on your device and fetches new ones when the saved copy is more than 12 hours old, so conversions keep working offline with the last known rates.

### Why is my bank's rate different?

The rates here are mid-market reference rates, halfway between buying and selling prices. Banks, card networks and exchange bureaus add a margin to that rate and some add a fixed fee, so the rate on your statement will differ.

### Which currencies have a history chart?

The 90-day chart uses the European Central Bank's reference rates, published for about 30 currencies including USD, EUR, GBP, INR, JPY, CNY, AUD and CAD. Pairs involving other currencies, such as AED or SAR, show a note instead of a chart.

### Quanto è preciso «Convertitore di valute»?

La precisione dipende dai dati inseriti e dalle ipotesi del metodo. Il calcolo decimale usa 50 cifre significative, ma stime, metodi numerici e dati di origine possono essere meno precisi; l’arrotondamento visualizzato non elimina questi limiti. Esempi svolti verificati con fonti indipendenti: 3. Per esempio, «100 at 83.5» viene verificato con 100 × 83.5; 1/83.5.

### Da dove proviene il metodo?

ExchangeRate-API open access endpoint (daily rates); Frankfurter — European Central Bank reference rates.

## Fonti

- [ExchangeRate-API open access endpoint (daily rates)](https://www.exchangerate-api.com/docs/free)
- [Frankfurter — European Central Bank reference rates](https://frankfurter.dev/)

_Solo per pianificare. Finanziatori, autorità fiscali e mercati applicano propri arrotondamenti, costi e regole; conferma le cifre con loro prima di assumere impegni._