# Cross Exchange Rate Calculator

URL: https://speedycalculator.com/calculators/finance/cross-exchange-rate/
Last updated: 2026-10-25

> The cross exchange rate calculator works out the exchange rate between two currencies from their rates against a common third currency (usually the U.S. dollar) – and converts an amount at that cross rate.

## Inputs

- Currency A per 1 unit of the common currency
- Currency B per 1 unit of the common currency
- Amount in currency A

## Results

- Cross rate: units of B per 1 A
- Cross rate: units of A per 1 B
- Amount converted to currency B

## Formula

```
If both are quoted per USD (units per 1 USD): A/B = (B per USD) ÷ (A per USD)
If one is quoted as USD per unit (e.g. EUR/USD): convert to units per USD first (1 ÷ rate)
```

## Explanation

Most currency pairs are priced through the U.S. dollar. Cross rates let you check whether a direct quote is fair and estimate conversion costs on less-traded pairs.

### How to use the Cross Exchange Rate Calculator

- **Currency A per 1 unit of the common currency**
- **Currency B per 1 unit of the common currency**
- **Amount in currency A**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter how many units of each currency equal one unit of the common currency, and an amount to convert.

### Tips

- Enter figures for the same period and in the same currency.
- Exchange rates and prices change constantly – update them before you rely on a result.
- Use results as estimates and confirm important figures with the official source.
- Everything runs in your browser – try different values to compare scenarios.

### Common mistakes to avoid

- Mixing gross and net figures.
- Using outdated rates.
- Treating rules of thumb as exact.

### Inputs explained

FieldWhat to enterCurrency A per 1 unit of the common currencyA numberCurrency B per 1 unit of the common currencyA numberAmount in currency AA number

### What each result means

- **Cross rate: units of B per 1 A** = [Currency B per 1 unit of the common currency]÷[Currency A per 1 unit of the common currency]
- **Cross rate: units of A per 1 B** = [Currency A per 1 unit of the common currency]÷[Currency B per 1 unit of the common currency]
- **Amount converted to currency B** = [Amount in currency A]×[Currency B per 1 unit of the common currency]÷[Currency A per 1 unit of the common currency]

### Example values

How the main result changes when **Currency A per 1 unit of the common currency** changes and everything else stays at the example values above:

Currency A per 1 unit of the common currencyCross rate: units of B per 1 A0.46608.69570.69405.79710.92304.34781.15243.47831.38202.89861.84152.1739

## Worked example

Inputs — Currency A per 1 unit of the common currency: 0.92; Currency B per 1 unit of the common currency: 280; Amount in currency A: 1,000.

Results — **Cross rate: units of B per 1 A = 304.34783**; Cross rate: units of A per 1 B = 0.003286; Amount converted to currency B = 304,347.83.

## FAQ

**What is a cross exchange rate?**
An exchange rate between two currencies calculated through a third currency.

**Why is the dollar used?**
Most currencies trade most actively against the U.S. dollar.

**Will my bank use this rate?**
Banks add a spread, so you'll usually get a slightly worse rate.

**What formula does the Cross Exchange Rate Calculator use?**
If both are quoted per USD (units per 1 USD): A/B = (B per USD) ÷ (A per USD).