This Factorio tutorial demonstrates how to build a balanced 2 to 6 belt splitter.
This belt balancer is very useful at train depots. Each train car can only be accessed by 6 inserters from each side, so a 1 to 6 or 2 to 6 belt splitter is often needed. This design shows you how to build such a splitter that provides an equal amount of items to each of the outgoing 6 belts. Providing an equal amount ensures that all your inserters are able to work for the same amount of time, decreasing the amount of time your trains have to wait in the depot to be loaded.