How much is $1 to €1?

Could you please clarify the exchange rate you're referring to in your question? As the exchange rate between the US dollar and the Euro can fluctuate depending on various economic factors, it's not a static figure. However, if you're asking for a general idea of how much one US dollar is worth in Euros, it's usually around 0.90 to 0.95 Euros, but this can vary. To get the most accurate rate, I recommend checking a reputable online currency converter or contacting your financial institution.