WBGT Calculator

The Wet Bulb Globe Temperature (WBGT) is a heat index that provides a more complete picture of the heat stress on the human body than a standard air temperature measurement. The WBGT is often used to better assess the risks of working or exercising in warm environments. The index combines four key environmental factors that determine how the body experiences and can dissipate heat: temperature, humidity, wind speed, and solar radiation.

This calculator provides a theoretical approximation based on limited inputs. It cannot account for actual environmental deviations and local microclimate effects such as terrain, obstacles, ground reflection (albedo), infrared radiation, wind blocks or cloud cover variability. You can use this app to approximate the WBGT using environmentat data when no certified device is available, to support informed decisions when tools or expertise are limited.

WBGT is an objective measure of the heat stress on a person. The actual physiological stress on a person is further influenced by personal and work-related factors like clothing, physical condition and acclimatization. These do not change the WBGT value itself, but do determine how a person responds to a certain WBGT value.

Recent changes:
- Location's altitude taken into account
- Added impact on related air pressure
- Info buttons now scroll to info window
- Full implementation of the Liljegren calculation model