# USD to PLN converter

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

- Page: https://www.acalculator.org/convert/usd-to-pln
- JSON spec: https://www.acalculator.org/convert/usd-to-pln.json
- Version: 5c8b2db6cdf0

## Default answer

Example with the default inputs (US dollar (USD) 1, Rate: PLN per 1 USD 3.84338): 1 USD = 3.84 PLN, at 1 USD = 3.84338 PLN. The ECB reference rates of 28 September 2026 give 1 USD = 3.84338 PLN.

## Inputs

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

## Outputs

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

## Method

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

## Assumptions

- The default rate, 1 USD = 3.84338 PLN, is worked out by this site from the ECB euro reference rates of 28 September 2026: 4.373 PLN per euro ÷ 1.1378 USD 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 = 3.843 gives result = 384.3. Source: hand calculation: amount × rate, at the ECB rate of 28 September 2026 for USD to PLN (3.84338) rounded to 4 significant figures.
2. result = 100, rate = 3.843 gives amount = 26.021337. Source: hand calculation: amount × rate, at the ECB rate of 28 September 2026 for USD to PLN (3.84338) rounded to 4 significant figures.
3. amount = 100, result = 384.3 gives rate = 3.843. Source: hand calculation: rate = result ÷ amount.

## FAQ

### How much is 1 USD in PLN?

At the ECB euro reference rates of 28 September 2026, 1 USD = 3.84338 PLN, and 1 PLN = 0.2601875 USD.

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

The ECB quotes every currency against the euro only. On 28 September 2026, 1 euro bought 1.1378 USD and 4.373 PLN, so 1 USD = 4.373 ÷ 1.1378 = 3.84338 PLN. 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