Cost of translation of cryptocurrency depends on a blockchain of cryptocurrency and its congestion.
At the exchanges, the fixed commissions which are, as a rule, uprated are used. It increases the speed of the translation and stability (if the network is overloaded). It is possible to learn about the commissions of your exchange on an output of cryptocurrencies/tokens in the section of an output (withdraw). Consider that the commissions of the same coins can vary depending on the exchange.
Examples of coins with the low commissions: Ripple, Waves, NEO (free of charge), LTC, ETC, BCH, ZEC, and others. The highest commissions traditionally belong to bitcoin.
The addition is free for any cryptocurrency. The commission is paid only by the sender of the transaction.