Brew hop substitution arithmetic calculator

Calculate replacement hop mass and original modeled utilized alpha acid mass with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use replacement hop mass and original modeled utilized alpha acid mass to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Original hop mass (g)
25
Original alpha acid fraction
0.1
Replacement alpha acid fraction
0.08
Original modeled utilization fraction
0.25
Replacement modeled utilization fraction
0.25
Replacement hop mass (g)
31.25
Original modeled utilized alpha acid mass (g)
0.625

Try another scenario

Original hop mass (g)
27.500000000000004
Original alpha acid fraction
0.1
Replacement alpha acid fraction
0.08
Original modeled utilization fraction
0.25
Replacement modeled utilization fraction
0.25
Replacement hop mass (g)
34.375
Original modeled utilized alpha acid mass (g)
0.6875
Calculation method

Calculation method

Replacement hop mass (g)

Match mass×alpha×utilization between original and replacement.

Original modeled utilized alpha acid mass (g)

Match mass×alpha×utilization between original and replacement.

Symbols and units
a
Original hop mass (g)
b
Original alpha acid fraction
c
Replacement alpha acid fraction
d
Original modeled utilization fraction
e
Replacement modeled utilization fraction

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Matches modeled bittering contribution only; flavor, aroma, oil and storage differences excluded. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Matches modeled bittering contribution only; flavor, aroma, oil and storage differences excluded.
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