Bigger, Better, Fatter

Beer.  The way it should be.  

Just a bunch of brewing brothers making great brews!

Over time, hops lose their overall Alpha Acid levels.  There are calculators to help calculate both the new Alpha Acid (AA) level / percentage as well as the new amount of hops needed to match the original weight and AA.  Check out the Hop Freshness Calculator on AlchemyOverlord's site:

 Hop Freshness Calculator