Qbrew batch sizes

[frankvw]

Simple and quick question (that Google has so far failed to answer): Is the batch size in Qbrew a pre-boil or post-boil batch size?

// FvW

 

[myndflyte]

I believe it is the amount that is going into the fermenter.

 

[frankvw]

Thank you! That would mean that Qbrew's IBU estimates could be a bit off, since boil evaporation isn't taken into account at all, i.e. the preboil gravity is assumed to be equal to the post boil gravity...

 

[ScrewyBrewer]

Thank you! That would mean that Qbrew's IBU estimates could be a bit off, since boil evaporation isn't taken into account at all, i.e. the preboil gravity is assumed to be equal to the post boil gravity...

@frankvw I think qBrew batch size reflects the gravity of the post-boil wort. If you plan to put 5.00 gallons into the fermenter but have 0.5 gallon lost to kettle trub loss set your batch size to 5.5 gallons.

 

[frankvw]

I think qBrew batch size reflects the gravity of the post-boil wort. If you plan to put 5.00 gallons into the fermenter but have 0.5 gallon lost to kettle trub loss set your batch size to 5.5 gallons.

Given the way other homebrewing software handles this (by adding and subtracting volumes) my guess would be that the batch size reflects the post boil volume before losses... "Guess" being the operative word, since what little documentation Qbrew comes with doesn't mention any of it.