Thank you, this makes more sense. The IBUs change dramatically when the 'late addition' is checked, so the calculator probably assumes that all the extract is added at 10 min (and counts only the sugars from the specialty grains for the boil). I will split the extracts in two parts and re-do the...

Hello, I created my first recipe with the recipe editor and I have a question regarding the IBU calculations for late extract addition. The total volume of the batch will be 14 litres and the boil volume will be 4 litres. I plan to steep some grains, add a part of the extract in the beginning...