Sugar Weight for Carbonation?
 

According to Brew Pal for my 5 gal batch of 15A Weizen/Weissbier I need 6.8-9.1 oz of priming corn sugar but Beer Smith says I need only 4.2 oz. Both were calculated at 70 degrees. Wondering which one is right.

4.2oz for 2.4 volumes of CO2 @ 70F. 6.8 would give you around 3.4 volumes which would probably be a bit too bubbly.

Jason

Well, weizens are more highly carbonated than some other beers, so if you want to be true to style, you can use more sugar. But I think 9 ounces would give you bottle bombs!

I'd use 5 ounces for 5 gallons, even if the beer is a bit less carbonated than the style would normally be, because excessive foam isn't enjoyable and neither are bottle bombs!