Home
Back
WBGT Equation:
| From: | To: |
Wet Bulb Globe Temperature (WBGT) is a composite temperature used to estimate the effect of temperature, humidity, wind speed, and solar radiation on humans. It's widely used in industrial, military, and athletic settings to manage heat stress.
The calculator uses the standard WBGT equation:
Where:
Explanation: The equation weights the wet bulb temperature most heavily (70%) as it best represents the body's ability to cool through sweat evaporation.
Details: WBGT is crucial for preventing heat-related illnesses in occupational and athletic settings. It helps establish work/rest schedules, hydration requirements, and protective measures during hot conditions.
Tips: Enter all three temperature measurements in °C. Values should be between -50°C and 100°C. For outdoor conditions, measurements should be taken in the sun at the height where work is being performed.
Q1: What's the difference between WBGT and heat index?
A: WBGT accounts for solar radiation and wind in addition to temperature and humidity, making it more comprehensive for outdoor heat assessment.
Q2: When is WBGT monitoring most important?
A: During hot weather, especially for outdoor workers, athletes, military personnel, and anyone engaged in strenuous activity in warm environments.
Q3: What are the risk levels based on WBGT values?
A: Generally, below 18°C is low risk, 18-23°C moderate risk, 23-28°C high risk, and above 28°C extreme risk requiring extreme precautions.
Q4: How often should WBGT be measured?
A: In high-risk environments, measurements should be taken at least hourly and whenever weather conditions change significantly.
Q5: Are there simplified methods for estimating WBGT?
A: While this calculator uses the full equation, simplified approximations exist but are less accurate for critical safety decisions.