I've wondered about the new conversion calculations requiring the total volume of water used, so I went with it on this recipe. The following was the result: Here's a close-up of that efficiency: It was a mutt brew so I wasn't really careful with my volumes. Here's a link to the recipe: https://www.brewersfriend.com/homebrew/recipe/view/1010854/speltweizen/343184 There is no sugar or anything else that should have punched the efficiency above 100%. So there's something I'm not getting about how the efficiency is calculated. As mentioned above, I've questioned it for some time. Now I have an impossible result. My only hypothesis is it's using the rice hulls as convertable grain weight.