IBU (Garetz) Calculator
Estimate your beer's bitterness in IBU with the Garetz method.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
The Garetz method estimates a beer’s bitterness in IBU (International Bitterness Units) using Mark Garetz’s hop utilization tables, but unlike the simpler Tinseth or Rager formulas, it also applies a gravity correction factor and an elevation correction factor — boiling temperature drops at altitude, which reduces hop isomerization and therefore bitterness.
Homebrewers use it to predict a finished beer’s bitterness before they ever brew it, and it’s particularly valued by brewers at high elevation, where the simpler formulas tend to overestimate how bitter the beer will actually turn out.
This calculator takes hop weight, alpha acid percentage, boil time, wort gravity and elevation, and returns the estimated IBU.
Was this helpful?
Popular calculators
Loan Calculator
Monthly payment, total interest and full amortization schedule.
Percentage Calculator
Percent change, percent of, and ratio calculations.
Discount Calculator
Calculate final price, savings, and discount amount.
BMI Calculator
Body mass index from height and weight (metric or imperial).
Age Calculator
Compute your exact age in years, months and days from a birth date.
Compound Interest Calculator
Calculate the final amount and interest earned with compounding.
All Calculators
No calculators found
Comments (0)