U.S Army’s Heat Index Calculator
Introduction & Importance
U.S Army’s Heat Index calculator is an essential tool to assess the human-perceived equivalent temperature, taking into account both air temperature and relative humidity. It’s crucial for preventing heat-related illnesses and fatalities.
How to Use This Calculator
- Enter the current temperature in Fahrenheit.
- Enter the current relative humidity percentage.
- Click ‘Calculate’ to see the Heat Index and its effects.
Formula & Methodology
The Heat Index is calculated using the following formula:
HI = -42.379 + 2.04901523*T + 10.14333127*RH – .2246573*T*RH – 6.83783e-3*T^2 – 5.481717e-2*RH^2 + 1.22874e-3*T^2*RH + 8.5282e-4*T*RH^2 – 1.99e-6*T^2*RH^2
Real-World Examples
Data & Statistics
| Temperature (°F) | Humidity (%) | Heat Index (°F) | Effects |
|---|---|---|---|
| 90 | 60 | 103 | Extreme caution: Heat cramps and heat exhaustion likely. |
Expert Tips
- Drink plenty of fluids.
- Avoid strenuous activities during peak heat hours.
- Wear light, loose-fitting clothing and a wide-brimmed hat.
Interactive FAQ
What is the Heat Index?
The Heat Index is a measure that combines air temperature and relative humidity to determine the human-perceived equivalent temperature.
For more information, see the OSHA guide on heat stress and the NOAA Heat Index calculator.