Sorry. Hard to do by phone when swmbo has the computer horded. It was a 5 gal recipe, 3 gal boil and 1oz hop additions at 60,10,5 min. Simple ibu calc gave 35 ibu's (23,8,4.5 for additions) but beersmith gave 18 eventhough sg was same as my math using palmers values. So with same gravitiesand aau's, not sure why so far off? Probably something simple..