Originally Posted by Oldsock
Just multiply all the ingredients by 6/5 to convert the recipe from 5 to 6 gallons. If you do a partial boil you might need to up the hopping a bit as well.
To convert to a partial mash just swap out as much pale malt as you want (leaving a few pounds to ensure everything converts/lauters) for pale extract (the conversion rate will depend on your efficiency and the efficiency the recipe was written for). In beersmith just put your efficiency and the amount of each grain you'll use in the partial mash, and then add extract until you hit the OG the recipe calls for.
Hope that helps, good luck.
So, to scale up a recipe, I should just multiply the ingredients by 6/5...is this what most people do? What about hops scaling?
In Beersmith and Beer Recipator etc, the automatic scaling for HOPS seems quite a bit more complex. The numbers usually work out differently. I'm not sure of the math it uses, but it's definitely not as simple as multiply by 6/5. I can see matching IBUs (whatever the math), but don't know what logic it uses for scaling aroma hops.