I'm new to this all-grain world, so excuse my newbieness....
I used the Brewer's Friend 'Brewhouse Efficiency Calculator', specifically the efficiency for 'Conversion' and/or 'Pre-Boil' as they were the same for me.
I rechecked and I did make a mistake which lowered my conversion efficiency down to 79.7% (I accidentally included grain absorption water).
Using the same calculator, my 'Brewhouse Efficiency' ended up at 77.58%.
I saw this on BYO.com for extraction efficiency and figured "OK, no big deal - I'm in the ballpark" - is this info not correct?
View attachment 722127