I should have just taken a gravity reading at the get go but it was a marathon brew day. 4, 4 gallon batches and 2, 5 gallon batches topped up with water. 100% pilsner light dry.
The dme I used was 75% fermentable, I guess I can try to work backwards from that. As for the final volume, it was very rough. It could have been as little as 35 gallons I suppose. Is there a general trend with how alcohol affects a refractometer? I would like to make a reasonable guess at...
So I failed to measure my beer untill after fermentation. I figure it's time to break out the refractometer to test the formulas on brewheads.com
www.brewheads.com/refract-getog.php
www.brewheads.com/refract-getabw.php
Using my tools on a control, I accurately (within about .1 %) measured a...