# Temperature Humidity Index (THI) Calculator Online

Last updated on by Editorial Staff

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## Quick Guide to Use This Calculator

• Step 1: Select the temperature unit (Celsius or Fahrenheit) using the dropdown menu.
• Step 2: Enter the ambient or dry-bulb temperature in the designated input field.
• Step 3: Enter the relative humidity in percentage in the respective input field.
• Step 4: Click the “Calculate THI” button to get the Temperature Humidity Index (THI) result in the selected unit.
• Step 5: The result will indicate the stress level for livestock along with the color-coded thermometer.

### Color code and ranges are as follows

• Normal (Less than 68) – Green Color
• Stress Threshold (68-72) – Yellow Color
• Moderate-Severe Stress (80-90) – Red Color
• Severe Stress (90 and above) – Purple Color

## Formula

THI in Fahrenheit= Tdb – [0.55 – (0.55 x RH/100)] x (Tdb – 58)

THI in Celsius = 0.8* T(db) + ( RH/100) * (T(db)-14.4) + 46.4

Where T (db) is ambient or dry bulb temperature in Fahrenheit

RH is relative humidity

The Temperature Humidity Index (THI) is a measure that combines ambient temperature and relative humidity to assess the level of stress and discomfort experienced by individuals, especially animals in a given environment.

## Who Can Use This Calculator?

Livestock farmers and caretakers can use this calculator to gauge the comfort levels of animals, ensuring optimal conditions for their well-being.

## Industries That Can Use This Calculator

Livestock farming industries can use this calculator. This is useful for dairy farms. Others can also use this calculator to trace their livestock’s behavior.

## Benefits of Using This Calculator

• Helps farmers identify potential stress in livestock due to temperature and humidity.
• Allows for timely adjustments in animal management practices to ensure their comfort.
• Aids in preventing heat-related health issues in livestock.

## FAQs

### How is THI calculated?

THI is calculated based on the ambient temperature and relative humidity using specific formulas for Celsius and Fahrenheit.

### How does high THI affect livestock?

High THI can lead to heat stress in livestock, impacting feed intake, milk production (in dairy cows), and overall animal well-being.

### What measures can be taken to reduce THI for livestock?

Providing shade, proper ventilation, and access to cool water are effective measures to reduce THI for livestock.

## Conclusion

The Temperature Humidity Index (THI) Calculator is a valuable tool for livestock farmers to assess and manage environmental conditions for their animals.

By considering temperature and humidity, this tool helps ensure the well-being of livestock and contributes to the overall success of livestock farming operations.