How many ETH is 1 dollar?

Excuse me, I'm a bit new to the cryptocurrency scene and I'm having difficulty grasping the concept of fluctuating exchange rates. Could you please explain to me how I would calculate how many Ethereum (ETH) I would receive for one dollar? I understand that the price of ETH fluctuates based on market conditions, but I'm just looking for a general idea of the conversion rate. Is there a specific platform or tool I should be using to make this calculation? I appreciate your assistance in clarifying this matter for me.