Template:TrainThroughput

The maximum throughput of a single train can be calculated in stacks/min or fluid using the following values:
 * Total round-trip duration of the train
 * Amount of Freight Cars
 * Storage capacity of each Freight Car (currently 32 stacks or 1600 m)

Then, the equation is:

$$Throughput = {Storage\ capacity \times Amount\ of\ carriages \over Round\ trip\ duration}$$

E.g. for a train of three carriages that completes the round trip in five minutes:

$${32 \times 3 \over 5} = 19.2$$ stacks per minute or $${1600 \times 3 \over 5} = 960$$ m per minute.

For more detailed info see the section on throughput on the Electric Locomotive page linked above.