Heat Index Calculator

Calculate apparent temperature (heat index) from temperature and relative humidity using NWS Rothfusz regression. Heat index: Caution >27°C, Extreme Caution >32°C, Danger >39°C, Extreme Danger >51°C.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How It Works

Calculate apparent temperature (heat index) from temperature and relative humidity using NWS Rothfusz regression. Heat index: Caution >27°C, Extreme Caution >32°C, Danger >39°C, Extreme Danger >51°C

Each component has a specific meaning:

  • Temperature — The temperature recorded for the patient or scenario being assessed.
  • Relative humidity — The relative humidity recorded for the patient or scenario being assessed.

Note: Interpret the heat index result against the clinical thresholds and context described above.

How to Use

Enter the temperature, relative humidity for the patient or scenario you are assessing. Calculate apparent temperature (heat index) from temperature and relative humidity using NWS Rothfusz regression. Heat index: Caution >27°C, Extreme Caution >32°C, Danger >39°C, Extreme Danger >51°C. Use the heat index result to inform your clinical assessment.

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Frequently Asked Questions