The Wet-Bulb Globe Temperature calculator computes the wet-bulb globe temperature index based on three temperature elements.
INSTRUCTIONS: Choose units and enter the following:
Wet-Bulb Globe Temperature (WBGT): The calculator returns the index in degrees Fahrenheit. However, this can be automatically converted to compatible units via the pull-down menu.
Theis a measure of heat stress which takes into account air temperature, humidity and solar radiation. The is:
WBGT=(0.1xDB) + (0.2xGT) + (0.7xWB)
The WBGT was developed for the US Marine Corps Recruit Depot on Parris Island in the late 1950's. Humidity at Parris Island can be very high and Marines are subject to intense training in full military gear under full sun. This creates conditions where there is substantial risk of heat injury.
The WBGT was later used by researchers as an easily measured general heat-stress index. In time its use widened. Because its use is recommended in the Standard, ISO 7243, it is often used in Occupational Health and Safety guidelines for working in hot environments. It has been advocated for use in sports requiring continuous exertion, such as the marathon. It is also used for horses in equestrian events.
The WBGT is measured by a device with three temperature elements:
1. UNITED STATES DEPARTMENT OF LABOR. (n.d.). Retrieved May 23, 2016, from https://www.osha.gov/dts/osta/otm/otm_iii/otm_iii_4.html#iii:4_2