How to do a batch send with ethereum tokens? How much will this save on fees?
You need to write a smart contract that will send your tokens to the correct addresses in 1 transaction.
To calculate the cost of a transaction, use this service:
https://etherscan.io/gastrackerIf you want to see how this works in practice and calculate the benefits, see how the organizers of the Bounty campaigns send their tokens to all participants.