How much is 1 HBAR in dollars?

Could you please clarify for me the current exchange rate? I'm trying to figure out how much one HBAR is worth in dollars. Is there a specific conversion rate I should be using, or does it fluctuate? If it does vary, is there a way to keep track of the most up-to-date value? Also, are there any fees or charges associated with converting HBAR to dollars that I should be aware of? I'd appreciate any information you can provide to help me understand this better. Thank you in advance for your assistance.