## How to Calculate Wind Chill Factor – WindChill Calculation Formula & Chart

Wind Chill refers to the perceived temperate with respect to human bodies. It is a combination of the ambient temperature and the speed of the wind. With a higher wind speed, the human body loses heat quickly & it feels colder than normal. For example, if the outside temperature is 35F and there is no wind, the human body would feel the temperature as 35F.

But if the wind is blowing at 10 miles per hour, the human body would feel that the temperature is lower than the actual temperature of 35F. In fact, the human body would perceive that the temperature is 27F. So the Wind Chill Factor is 27F when the outside temperature is 35F and the wind is blowing at 10 mph.

Wind Chill Factor calculation could differ from the way it is done in different parts of the world. US for example calculates it differently from Australia. Windchill Temperature is only defined for temperatures at or below 10 °C (50 °F) and wind speeds above 4.8 kilometres per hour (3.0 mph).

Wind Chill Calculation Formula:

The National Weather Service provides the easy mathematical formula to calculate wind chills as shown below.

Wind Chill (F) = 13.12 + 0.6215 x Ambient Temperature + 0.3965 x Ambient Temperature x (Wind Speed) ^ 0.16 – 11.37 x (Wind Speed) ^ 0.16

Click here to calculate Wind Chill Factor online. This free wind chill calculator shows you the old value as well as the updated wind chill factor together.

If you find this calculation difficult, there is an easier way to find the wind chill from the chart below. Locate the approximate wind speed on the vertical Y axis and the approximate outside temperature on the top X axis and the co-ordinate will give you a very close Wind Chill Factor.

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