Roughly, 2 oz of dme in 5 gallons will raise you .001. For example, to go from 1.035 to 1.040 you need +.005, so 5 x 2 oz, or 10 oz. So however many points you want to go up, just multiply that by 2, and that's the ounces (by weight) of dme that you need to add to 5 gallons.
This calculation is probably just a little high, but will get those of us who are mathematically challenged close enough.
Yeah, that's enough math for me, I'm a language guy.Lol
Funny, I'm a builder and can do all kinds of number things in my head related to building. But with stuff like this I have to have paper and calculators to get really close.