#### DuncB

##### Well-Known Member

Calculations for alcohol using the Brewfather tools converting from Brix to Gravity seem very accurate when compared to my hydrometer.

The calculator for alcohol needs the original gravity when it's input is fermented which normally isn't a problem, but for the imperial stout I'm making the recipe has called for 1.2 kg of dextrose to be added in increments at the end of the fermentation.

So my starting OG was 1.107 for 23 litres, do I just add the 386 points per kg per litre to bump up the OG figure for the calculation?

ie 386 x 1.2 divided by 23 and added to 1.107 for New OG?

So my new OG is 1.127 ?