The heat index calculator estimates the heat index felt by the human body based on the environmental temperature and relative humidity. The calculator automatically converts the values from one scale to another.
“The heat index is the temperature or the humidex(humidity index) of temperature felt by the human body”
When you are measuring the heat index, you are taking into account both the temperature and the humidity level of the surrounding environment.
You can measure the heat index by calculating the environmental temperature, and relative humidity of the surrounding. The heat index may vary significantly in the shaded area and in sunlight due to changes in temperature. The formula for measuring the Heat Index is:
Where:
There can be different values of the constant value “c” due to different temperatures. The heat index humidity directly affects the measurement of the heat index. You should consider what is the temp constant “c” for a specific temperature(°C or °F), its values going to change readily for relative temperatures. Try to choose the heat index chart for a specific temperature (°C or °F). You can measure what is the heat index today with the heat index calculator regardless of location. The wet bulb effect would also increase at a higher heat index. In the table below the values of “c” in °C and °F are given:
| PARAMETER | °C | °F |
|---|---|---|
| c₁ | -8,785 | -42,379 |
| c₂ | 1,611 | 2,049 |
| c₃ | 2,339 | 10,143 |
| c₄ | -0,146 | -0,225 |
| c₅ | -1,231 ⋅ 10⁻² | -6,838 ⋅ 10⁻³ |
| c₆ | -1,642 ⋅ 10⁻² | -5,482 ⋅ 10⁻² |
| c₇ | 2,212 ⋅ 10⁻³ | 1,229 ⋅ 10⁻³ |
| c₈ | 7,255 ⋅ 10⁻⁴ | 8,528 ⋅ 10⁻⁴ |
| c₉ | -3,582 ⋅ 10⁻⁶ | -1,990 ⋅ 10⁻⁶ |
The heat index can have potentially severe medical effects on humans. In high heat index conditions, perspiration is hindered due to reduced evaporation as a result of high humidity. The heat index humidity can be difficult to breathe and cramping may happen. Better to use the humidity calculator before traveling to a specific location or destination. There can be various consequences of the high heat index.
The following heat index chart describes the precautionary measures at various temperatures.
| Celsius | Fahrenheit | Precautions |
|---|---|---|
| 27-32°C | 80-90°F | Fatigue is possible with prolonged exposure and activity. Continuing activity could result in heat cramps. |
| 32-41°C | 90-105°F | Fatigue is possible with prolonged exposure and activity. Continuing activity could result in heat cramps. |
| 27-32°C | 80-90°F | Extreme caution: heat cramps and heat exhaustion are possible. Continuing activity could result in heat stroke. |
| 41-54°C | 105-130°F | Danger: heat cramps and heat exhaustion are likely; heat stroke is probable with continued activity. |
| Over 54°C | Over 130°F | Extreme danger: heat stroke is imminent. |
The heat index calculator indicates the atmospheric conditions of a certain area. The heat index chart may indicate a hot, very hot, warm, and extremely hot heat index. Despite the rising heat index humidity, the real feels like the temperature calculator may indicate it is bearing heat index
For an accurate estimation of the Heat index, follow the steps:
Input:
Output:
The dew point, temperature, or relative humidity are interconnected and interconvertible. The heat index calculator will immediately calculate their values.
From the source of Wikipedia: Heat index, Meteorological considerations From the source of weather.gov: Heat Safety, Heat Disorders
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