Examples
Examples
Try the starting example
- Boil hop additions JSON [[mass g,alpha acid fraction,time minutes],...]
- [[25,0.1,60],[20,0.06,15]]
- Average boil wort SG
- 1.05
- Final wort volume (L)
- 20
- Tinseth utilization fractions by addition
- [0.230664077251,0.11445617782]
- Modeled IBU contributions
- [28.8330096564,6.8673706692]
- Total modeled IBU
- 35.70038
Try another scenario
- Boil hop additions JSON [[mass g,alpha acid fraction,time minutes],...]
- [[26,0.1,60],[20,0.06,15]]
- Average boil wort SG
- 1.05
- Final wort volume (L)
- 20
- Tinseth utilization fractions by addition
- [0.230664077251,0.11445617782]
- Modeled IBU contributions
- [29.9863300426,6.8673706692]
- Total modeled IBU
- 36.853701
Calculation method
Calculation method
Tinseth utilization fractions by addition
U=1.65×.000125^(SG-1)×(1-exp(-.04t))/4.15; IBU=U×alpha×grams×1000/volume.
Modeled IBU contributions
U=1.65×.000125^(SG-1)×(1-exp(-.04t))/4.15; IBU=U×alpha×grams×1000/volume.
Total modeled IBU
U=1.65×.000125^(SG-1)×(1-exp(-.04t))/4.15; IBU=U×alpha×grams×1000/volume.
Symbols and units
- a
- Boil hop additions JSON [[mass g,alpha acid fraction,time minutes],...]
- b
- Average boil wort SG
- c
- Final wort volume (L)
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
- Tinseth boil additions only; not measured bitterness, whirlpool or dry-hop extraction. 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. Tinseth boil additions only; not measured bitterness, whirlpool or dry-hop extraction.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.