Calculate Wind Chill

Result

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Enter temperature and wind speed, then click Calculate.

How Wind Chill is Calculated

Wind chill represents the rate of heat loss from exposed skin caused by the combined effects of wind and cold air. The standard index equation used by meteorological services is:

For Fahrenheit (°F) and Wind Speed (V, mph):
Wind Chill = 35.74 + 0.6215 × T − 35.75 × V^0.16 + 0.4275 × T × V^0.16

For Celsius (°C) and Wind Speed (V, km/h):
Wind Chill = 13.12 + 0.6215 × T − 11.37 × V^0.16 + 0.3965 × T × V^0.16

Wind Chill Threshold Limits

The official wind chill formula is defined for wind speeds where the cooling effect is meaningful:

Air Temperature: While traditionally applied under 50°F (10°C), this calculator evaluates the index across all temperatures.
Wind Speed: Must be at or above 3 mph (4.8 km/h). Calmer winds do not significantly accelerate skin heat loss.

FAQ

Does wind chill affect inanimate objects?

No. Wind chill only applies to living creatures that generate heat. While wind will cool an inanimate object (like a car radiator or water pipe) down to the actual air temperature faster, it cannot cool the object below the actual dry air temperature.

What is the risk of frostbite under high wind chills?

As the wind chill index falls, the danger of frostbite increases. At wind chills below −18°F (−28°C), frostbite can occur on exposed skin in 30 minutes or less.

Disclaimer. RapidRatio is informational only. It is not professional safety, medical, or meteorological advice. Extreme cold conditions represent real hazards; always dress warmly and consult local weather warnings.

Wind Chill Calculator