Estimate how hot it feels from humidity and temperature.
Last Updated: 03 Feb 2026
Heat Index: 99.678 F
Heat Index: 37.599 C
Heat Index Calculator helps you estimate how hot it feels from humidity and temperature. It is commonly used by engineers, lab users, field operators for heat index calculator, feels like temperature, relative humidity.
Heat Index (Feels Like)
Input temperature and relative humidity to estimate heat index in both °F and °C.