Originally Posted by beergolf
It is easy to convert.
1lb base grain= .75 LME= .6 DME.
for pilsen or extra-light extract use this.
it gets very experimental with amber and dark extract in recipes
You'll never get it 100% right because the data about whats in it isn't there.
1 lb of amber DME could be 1.4lbs base malt and 2oz of a crystal and you'd be close (but what crystal? 40-60 maybe will get you close)
dark extract is sometimes made with chocolate malt so 2oz chocolate and 1.4lbs of base malt will get your colour close to 1lb of dark DME, but not exact
most extract recipes are in the 6lb range. to make a partial that replaces 1/2 that (3lb bag of extract) is about 4.5 lbs base malt and 6oz specialty. A five gallon batch can still be done on the stovetop and cut your batch cost by about 40%