Can someone verify my efficiency math. 20 pounds pale ale malt 2 pounds flaked wheat malt 2 pounds flaked oats malt 1.2 pounds Dextrin malt The recipe I pulled from the web said I should be looking for a 1.066 OG at 72% When I put in the numbers in the brewhouse efficiency calculator it says I should be looking for 1.047 at 75%. Thanks in advance.
If 10 gallons, I agree I'd expect about 1.066. Can you confirm -- what was your goal for post-boil volume?
The 1.047 number is totally wrong unless maybe that was for pre-boil (vs. post-boil) and you boiled off several gallons. If you got 11.5 gallons at 75% efficiency, that's OG 1.060. Now, if your efficiency was not quite that great but more like 70% which might be more realistic, then your OG would be about 1.056. It's not enough to know just the efficiency and grist. Measure the gravity and volume with the grist, and that determines your efficiency. Then once you know your efficiency, you can take it the other way to predict gravity on future batches.
