# Yen to USD converter

Converts Japanese yen (JPY) to US dollar (USD) and back at the ECB euro reference rates of 28 September 2026, or at your own rate.

- Page: https://www.acalculator.org/convert/yen-to-usd
- JSON spec: https://www.acalculator.org/convert/yen-to-usd.json
- Version: 97ccc4a64b36

## Default answer

Example with the default inputs (Japanese yen (JPY) 1,000, Rate: USD per 1 JPY 0.006374): 1,000 JPY = 6.37 USD, at 1 JPY = 0.00637423 USD. The ECB reference rates of 28 September 2026 give 1 JPY = 0.00637423 USD.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| amount | Japanese yen (JPY) | The amount in JPY. |
| result | US dollar (USD) | The same amount in USD. |
| rate | Rate: USD per 1 JPY | How many USD one JPY buys. It starts at the ECB rate of 28 September 2026; type your bank's rate to use it. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| amount | Japanese yen (JPY) | The amount in JPY. |
| result | US dollar (USD) | The amount in USD. |
| rate | Rate: USD per 1 JPY | How many USD one JPY buys in this answer. |
| inverse | Inverse: JPY per 1 USD | How many JPY one USD buys. |

## Method

USD = JPY × rate. The ECB rate is a cross rate: (USD per euro) ÷ (JPY per euro), to 6 significant figures.

## Assumptions

- The default rate, 1 JPY = 0.00637423 USD, is worked out by this site from the ECB euro reference rates of 28 September 2026: 1.1378 USD per euro ÷ 178.5 JPY per euro, rounded to 6 significant figures. The ECB does not publish rates between two non-euro currencies.
- The ECB publishes its reference rates for information purposes only, not for transactions. Banks and cards add a margin or a fee; type their rate to see what you would get.
- Amounts are rounded to 2 decimal places, without trailing zeros (24.4 means 24.40), and rates show up to 7 significant figures; the calculation keeps full precision.

## Worked examples

1. amount = 100, rate = 0.006374 gives result = 0.6374. Source: hand calculation: amount × rate, at the ECB rate of 28 September 2026 for JPY to USD (0.00637423) rounded to 4 significant figures.
2. result = 100, rate = 0.006374 gives amount = 15,688.735488. Source: hand calculation: amount × rate, at the ECB rate of 28 September 2026 for JPY to USD (0.00637423) rounded to 4 significant figures.
3. amount = 100, result = 0.6374 gives rate = 0.006374. Source: hand calculation: rate = result ÷ amount.

## FAQ

### How much is 1 JPY in USD?

At the ECB euro reference rates of 28 September 2026, 1 JPY = 0.00637423 USD, and 1 USD = 156.8817 JPY.

### Where does the JPY to USD rate come from?

The ECB quotes every currency against the euro only. On 28 September 2026, 1 euro bought 178.5 JPY and 1.1378 USD, so 1 JPY = 1.1378 ÷ 178.5 = 0.00637423 USD. This cross rate is worked out by this site; the ECB does not publish it.

### Can I use this rate at my bank?

Not exactly. The ECB publishes its reference rates for information purposes only and strongly discourages their use for transactions. Banks, cards, and exchange offices add a margin or a fee. Type the rate they offer into the rate box to see what you would receive.

### How often does the rate change?

The ECB sets one reference rate per currency on each TARGET working day, at about 16:00 CET. This page shows the rates of 28 September 2026; they change when the site is rebuilt with a newer copy.

## Sources

- European Central Bank, euro foreign exchange reference rates of 28 September 2026. https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml
- European Central Bank, "Euro foreign exchange reference rates": published at about 16:00 CET on TARGET working days, for information purposes only. https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html
- European Central Bank, disclaimer and copyright: free reuse with the ECB cited as the source; changes to the data must be stated. https://www.ecb.europa.eu/services/using-our-site/disclaimer/html/index.en.html