# USD to MXN converter

Converts US dollar (USD) to Mexican peso (MXN) 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-mxn
- JSON spec: https://www.acalculator.org/convert/usd-to-mxn.json
- Version: b55793cf18ab

## Default answer

Example with the default inputs (US dollar (USD) 1, Rate: MXN per 1 USD 17.7652): 1 USD = 17.77 MXN, at 1 USD = 17.7652 MXN. The ECB reference rates of 28 September 2026 give 1 USD = 17.7652 MXN.

## Inputs

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

## Method

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

## Assumptions

- The default rate, 1 USD = 17.7652 MXN, is worked out by this site from the ECB euro reference rates of 28 September 2026: 20.2133 MXN 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 = 17.77 gives result = 1,777. Source: hand calculation: amount × rate, at the ECB rate of 28 September 2026 for USD to MXN (17.7652) rounded to 4 significant figures.
2. result = 100, rate = 17.77 gives amount = 5.627462. Source: hand calculation: amount × rate, at the ECB rate of 28 September 2026 for USD to MXN (17.7652) rounded to 4 significant figures.
3. amount = 100, result = 1,777 gives rate = 17.77. Source: hand calculation: rate = result ÷ amount.

## FAQ

### How much is 1 USD in MXN?

At the ECB euro reference rates of 28 September 2026, 1 USD = 17.7652 MXN, and 1 MXN = 0.05628967 USD.

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

The ECB quotes every currency against the euro only. On 28 September 2026, 1 euro bought 1.1378 USD and 20.2133 MXN, so 1 USD = 20.2133 ÷ 1.1378 = 17.7652 MXN. 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