That depends on the exchange, some charge extremely high fees, others charge minimum fees. As an example, Coinbase charges reasonable withdrawal fees that corr

That depends on the exchange, some charge extremely high fees, others charge minimum fees. As an example, Coinbase charges reasonable withdrawal fees that correspond to the actual TX fee, around $0.05 when I last used it a few weeks ago. Others charge absurdly high fees, biggest examples of that being Binance and Bitstamp that charged ~$20 for a Bitcoin withdrawal around the same time Coinbase was charging $0.05. Point being, different exchanges charge different fees, and LocalBitcoins is always an option if you want to avoid exchanges altogether.