I took a couple of years off and I have forgotten how I used to convert 5 gallon recipes to 10 gallon. I have looked online for calculator and have had no luck. If I remember correctly you double everything except the hops. Any suggestions?
I just tried it with Beersmith, by clicking on "scale" recipe to 10 gallons. It looks like it just doubled everything. The OG and the IBUs are identical, but the SG/IBU ratio changed slightly.