Wet Bulb Globe Temperature Calculator
The wet bulb globe temperature, or WBGT, is the heat stress index used by the military, athletic trainers and occupational safety agencies to set work and rest limits in the heat. Unlike the heat index, it accounts for sunlight and radiant heat as well as humidity, which is why it is the preferred standard for outdoor activity. This calculator gives a practical outdoor estimate by combining a wet bulb temperature derived from the air temperature and humidity, a globe temperature raised by a solar adjustment, and the dry air temperature using the standard outdoor weighting of seventy, twenty and ten percent. Enter the temperature, the relative humidity and the sun condition, choose your units, and read the estimated WBGT with its color coded flag zone. Because full WBGT needs specialized sensors, treat this as guidance rather than a certified reading. All computation runs locally in your browser for instant, private results.
How to use Wet Bulb Globe Temperature Calculator
- Enter the air temperature and humidity.
- Indicate the sun conditions.
- Read the estimated WBGT value.
- Match it to the heat stress risk zone.
Frequently asked questions
What is WBGT and what does it estimate?
Wet bulb globe temperature blends air temperature, humidity and solar heating into a single heat stress index used for outdoor work and sport safety.
How does WBGT differ from the heat index?
WBGT adds the effect of direct sun and wind on top of temperature and humidity, so it better reflects heat stress for people active outdoors in sunlight.
What do the risk zones mean?
Higher WBGT values fall into caution, extreme caution, danger and extreme danger zones that guide work to rest ratios and activity limits.
What is Wet Bulb Globe Temperature Calculator?
The wet bulb globe temperature, or WBGT, is the heat stress index used by the military, athletic trainers and occupational safety agencies to set work and rest limits in the heat. Unlike the heat index, it accounts for sunlight and radiant heat as well as humidity, which is why it is the preferred standard for outdoor activity.
Is Wet Bulb Globe Temperature Calculator free to use?
Yes. Wet Bulb Globe Temperature Calculator is completely free, with no sign-up and no usage limits.
Does Wet Bulb Globe Temperature Calculator work in a web browser?
Yes. Wet Bulb Globe Temperature Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Wet Bulb Globe Temperature Calculator?
Yes. Wet Bulb Globe Temperature Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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