I'm looking at a website that figures out the potential price of a coin if it had a certain market cap.
I'm not sure I understand the underlying calculations though.
It's well established that:
Market cap = Circulating Supply * Price
So, if you plug in a market cap value, you'd still need to know the coin's circulating supply to determine its price: how is it possible to determine the circulating supply of a coin at any given point in time?