Alpha Acid Calculator
Alpha Acid Calculator helps brewers adjust hop quantities for consistent beer bitterness. Input original weight, original/new alpha acid % to get precise new hop weight instantly
About This Tool
What It Does
This calculator determines the exact amount of hops needed when switching between batches with different alpha acid percentages, ensuring consistent bitterness in your brew1.
How to Use
- Enter Values:
- Original hop weight (e.g., 40g)
- Original alpha acid % (e.g., 4%)
- New alpha acid % (e.g., 4.6%)
- Click “Calculate”: The tool displays the adjusted hop weight (e.g., 34.78g)
Key Notes
Works with any unit (grams, ounces, etc.).
For partial measurements, use the Advanced Calculator1.
Example:
“Reducing 40g of 4% hops to 34.78g for 4.6% maintains identical bitterness.”