Simple Starter Question

Does this look right?

3 oz of DME in 1 L of water = 1.030 1L starter

6 oz of DME in 2 L of water = 1.030 2L starter

now for a lager of alt beer one may suggest a 3L starter; however, I like most of the free world do now own a 3L Erlenmeyer flask, so how would one do a 3L starter? Is it possible to make one in a 2L flask, but with more DME? Say 9 oz of DME in 2L of water?

You can do a “stepped starter” to get the yeast population you need.

Read this: http://yeastcalc.co/