Hops Alpha Adjustment

BrewCo Brew Tools

Your recipe calls for hops at one alpha acid % — but the hops you've got are different. This calculator finds the right weight to use so your bittering stays on target.

How to use it

  1. Check the alpha acid % and weight your recipe calls for.
  2. Check the alpha acid % on the packet of the hops you actually have.
  3. Enter all three figures — the calculator gives you the adjusted weight to use.
Check the packet — alpha acid % varies by harvest year.
— g
Fill in all three fields above

Why does alpha acid % vary?

Alpha acid content changes year to year with growing conditions, and even batch to batch from the same farm. Always check the % printed on your pack rather than assuming a fixed figure for a variety — this is exactly what this calculator is for.

More free home brew calculators

Browse our full range of hop pellets at BrewCo UK — T90 pellets from £5.99.