# Conversor de moedas

> Converta entre 160 moedas com as taxas de referência diárias mais recentes, sua data e um gráfico histórico de 90 dias.

Versão interativa: https://www.calcopenly.com/pt/finance/currency-converter
Tema: Calculadoras financeiras

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.

## Dados

- **Amount**
- **De**
- **Para**
- **Rate (1 from = ? to)**

## Resultados

- Converted — resultado principal
- Inverse rate

## Exemplos resolvidos

### 100 at 83.5

- Amount: 100
- De: USD
- Para: INR
- Rate (1 from = ? to): 83.5
- **Converted: 8,350.00**
- **Inverse rate: 0.011976**
- Fonte de verificação: 100 × 83.5; 1/83.5

### Zero amount

- Amount: 0
- De: USD
- Para: INR
- Rate (1 from = ? to): 1.1
- **Converted: 0.00**
- Fonte de verificação: 0 × rate

### Half-cent rounding

- Amount: 3
- De: USD
- Para: INR
- Rate (1 from = ? to): 0.335
- **Converted: 1.00**
- **Inverse rate: 2.98507**
- Fonte de verificação: 3 × 0.335 = 1.005 → 1.00 half-even; 1/0.335

## Perguntas

### 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.

### Qual é a precisão de “Conversor de moedas”?

A precisão depende dos dados inseridos e das hipóteses do método. O cálculo decimal usa 50 algarismos significativos, mas estimativas, métodos numéricos e dados de origem podem ter menor precisão; o arredondamento exibido não elimina essas limitações. Exemplos resolvidos verificados com fontes independentes: 3. Por exemplo, “100 at 83.5” é verificado com 100 × 83.5; 1/83.5.

### De onde vem o método?

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

## Fontes

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

_Apenas para planejamento. Credores, autoridades fiscais e mercados aplicam seus próprios arredondamentos, tarifas e regras; confirme os valores com eles antes de assumir um compromisso._