DME to raise gravity.

[Rondacker]

I've seen threads stating to add DME to raise low gravity. Is there a rule of thumb?
How much extract to raise a given amount?

 

[944play]

DME is about 44 ppg, meaning gravity points per pound per gallon -- 1 pound of DME in 1 gallon of water makes a 1.044 wort. In 5 gallons, 1 pound adds around 9 gravity points.