Examples
Examples
Try the starting example
- Air temperature (°F)
- 90
- Relative humidity (%)
- 60
- Rothfusz regression heat index (°F)
- 99.677718
- Heat index (°C)
- 37.598732
Try another scenario
- Air temperature (°F)
- 99.00000000000001
- Relative humidity (%)
- 60
- Rothfusz regression heat index (°F)
- 125.970393
- Heat index (°C)
- 52.205774
Calculation method
Calculation method
Rothfusz regression heat index (°F)
NWS Rothfusz regression in its warm humid range; restrict to RH40–85 to avoid low/high humidity correction branches.
Heat index (°C)
NWS Rothfusz regression in its warm humid range; restrict to RH40–85 to avoid low/high humidity correction branches.
Symbols and units
- a
- Air temperature (°F)
- b
- Relative humidity (%)
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
- Reference estimate for shade/light wind, not exposure guidance. Restricted to regression domain shown. 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. Reference estimate for shade/light wind, not exposure guidance. Restricted to regression domain shown.
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.