Normally I make a 1 qt starter using 1/2 cup DME. This time I will be making a 1800 ml starter. What is the best amount of DME to use for this? Thanks.
I can't help but notice that you switched from quarts to ml in the same paragraph.
When I make a starter I do one 1/2 cup to 1 quart. When I scale it up or down I still use Imperial measures so that it is simple math to get the result.
Now for a serious answer. Your goal is to have 1.040 gravity on the wort you add.