Before we can do any calculations, we need you to tell us a bit about your workplace situation.
This will help us to more accurately calculate the heat stress level for you:



First things first:
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What type of data have you collected?
Based on your temperature relative humidity measurements, which of the following options would you like to use for your estimate::

WBGT – Wetbulb Globe Temperature

Humidex Method: 1 of 6
WBGT Estimate Method: 1 of 6
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MEASUREMENT LOCATION
Have the temperature and relative humidity measurements been taken with 30 ft (10 m) of the exposed worker(s)?
Humidex Method: 2 of 6
WBGT Estimate Method: 2 of 6
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TEMPERATURE and RELATIVE HUMIDITY
Enter the current values in the location being tested:
Temperature  
Relative Humidity %

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NOTE: Thermal hygrometers are an inexpensive (usually <$30) way to measure the temperature and relative humidity if you don’t already have access to such measurements.
Humidex Method: 3 of 6
WBGT Estimate Method: 3 of 6
Detailed WBGT Method: 2 of 8
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TRAINING / KNOWLEDGE
Workers /supervisors are able to recognize heat stress signs and symptoms and know what to do to prevent them.



Humidex Method: 4 of 6
WBGT Estimate Method: 4 of 6
Detailed WBGT Method: 3 of 8
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INDOORS / OUTDOORS
Are you / workers working:
Humidex Method: 5 of 6
WBGT Estimate Method: 5 of 6
Detailed WBGT Method: 4 of 8
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CLOTHING /PPE

Are you / your workers wearing typical work clothing?
Typical Work Clothing
  • long sleeved shirt
  • long pants
  • underwear
  • socks
  • shoes or boots
Are you / your workers wearing any additional clothing / PPE?

Additional Clothing / PPE
•gloves • apron • jacket
coveralls • facemask
• goggles • respirator
• ear muffs • hospital gown
• etc.

Humidex Method: 6 of 6
WBGT Estimate Method: 6 of 6
Detailed WBGT Method: 5 of 8
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ADDITIONAL RADIANT HEAT / MOISTURE SOURCES
Is there exposure to radiant heat or moisture sources beyond working outdoors in the sun?



Examples
  • metalworking fluids with water
  • large tanks of aqueous solutions
  • dishwashing equipment
  • heated grills, ovens
  • molten metal/glass machines
  • hot pavement
Detailed WBGT Method: 1 of 8
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WET BULB AND GLOBE THERMOMETER
Does the equipment you are using have a wet bulb and a globe thermometer?

Enter the current WBGT value in the location being tested:
Temperature  

WBGT measurements can be estimated from workplace temperature and relative humidity. Please use the WBGT Estimate Method.

Detailed WBGT Method: 6 of 8
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METABOLIC CATEGORY
Select the metabolic rate associated with work activities:


Examples

View examples of the different levels of work

Detailed WBGT Method: 7 of 8
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WORKER WEIGHT

How many workers are included in this assessment?
Weight  

For multiple workers, enter the lower and higher ends of the weight range:

Lowest:  
Highest:  

Detailed WBGT Method: 8 of 8
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FEMALE SEX AT BIRTH
Was the worker female at birth, or does the group have workers who were female at birth?

SUMMARY

This is a summary of the information you have provided:

METHOD OF CALCULATION:
TEMPERATURE and RELATIVE HUMIDITY:
TRAINING / KNOWLEDGE:
INDOORS / OUTDOORS:
CLOTHING:
RADIANT HEAT:
PHYSICAL DEMANDS / ACCLIMATIZATION:


Use the edit icon Edit if you need to make any required changes.


The next step is to calculate the heat stress factor for this work scenario.

Press CALCULATE to continue: