# Homebrewers Association | AHA Forum

## General Category => Ingredients => Topic started by: bathtubbrewer on March 21, 2011, 11:07:00 PM

Post by: bathtubbrewer on March 21, 2011, 11:07:00 PM
I bought "How to Brew" a couple days before I bought my first kit.  Since the kit was pretty much just handed to me by the guy at my brew shop, I wanted to do a little work (as described in How to Brew) to make sure I understood what I was doing and why I was doing it.  I started by trying to calculate my OG.  Here's my question/problem:  I don't understand why some malt extracts are measured by 'points' and some are measured by the Lovibond scale.  I was given two 3.3 lb cans of LME Amber (35 points) and a 1 lb bag of Munton's Amber DME with a Lovibond rating of 7.  Is the Munton's just for color?  If so, when do I add it?

I made my first batch anyway...  Couldn't wait any longer.  Wish me luck.
Post by: tygo on March 21, 2011, 11:14:23 PM
Lovibond is a color scale.  Specific gravity or points per pound per gallon (pppg) are a measure of the sugar contribution.  Amber DME should have around 44 pppg.  So your 6.6lbs of Amber LME and 1 lb of Amber DME should give you a specific gravity of 1.055 assuming it's for a five gallon batch.

6.6lb x 35 pppg = 231 gravity points
1.0lb x 44 pppg =  44 gravity points
Total Gravity Points = 275

Original Gravity = 275 / 5 gallons = 55 points per gallon or SG 1.055.