Originally Posted by Mongo64
LME is 36 points/pound/gallon.
DME is 40 points/pound/gallon.
Take the above number, multiply by gallons and then multiply by points needed; should result in pounds of extract needed.
Not so much. Too much multiplication... 36*5gallons*11 points=1980.
You confirmed what I wasn't sure of in saying LME is 36 points PER pound PER gallon.
Meaning that one pound is 36 points in one gallon, then dividing it's 18pts in two gal, 12 in 3, 9 in 4, and 7.2 points in 5 gallons.
If you need 11 points in 5 gallons, you divide 11 by 7.2= 1.528 lbs, round to 1.5 lbs for simplicity.