You can use Yahoo's Currency Converter, or you can use Google as a currency converter. To find out the amount in the currency of your choice, simply type in the Google search box:
(amount) MXN in USD (or EURO, or other currency)
Where to Exchange Money in Mexico
You can change money in banks, but it is often more convenient to change currency in a casa de cambio. These businesses are open longer hours than banks, usually do not have long line-ups as banks often do, and they offer comparable exchange rates (though banks may offer a slightly better rate). Check around to see where you will receive the best exchange rate. There is usually no charge to exchange cash, but if you want to cash travelers checks, there may be a fee. Also you do not need to present identification when changing cash currency, but you will need to show your passport to cash travelers checks.

