Wind Chill Calculator

About Wind Chill Calculator

Wind Chill Calculator uses the Environment Canada and NOAA wind chill formula to compute the feels-like temperature from air temperature and wind speed. The formula applies when the temperature is at most 10°C (50°F) and wind speed is at least 4.8 km/h (3 mph). Results are shown in both °C and °F with a colour-coded danger level based on Environment Canada thresholds. The wind chill index is the standard used by meteorological agencies in Canada, the United States, and many other countries to communicate cold weather risk. The formula is valid for temperatures at or below 10°C and wind speeds of at least 4.8 km/h. Below those thresholds, wind has no significant cooling effect on exposed skin and the calculator shows a no-effect message instead.

How to use Wind Chill Calculator

  1. Enter air temperature in °C or °F
  2. Enter wind speed in km/h or mph
  3. See feels-like temperature and danger level

Frequently Asked Questions

What formula is used?
The calculator uses the Environment Canada and NOAA wind chill index formula: WC = 13.12 + 0.6215 x T - 11.37 x V^0.16 + 0.3965 x T x V^0.16, where T is air temperature in °C and V is wind speed in km/h.
When does wind chill apply?
The formula is valid when the air temperature is 10°C or below and wind speed is at least 4.8 km/h. At higher temperatures or very low wind speeds, wind chill has no meaningful effect on exposed skin.
What do the danger levels mean?
Low risk (above -9°C): normal conditions. Caution (-9 to -27°C): dress in layers. Danger (-27 to -39°C): risk of frostbite in 10-30 minutes. Extreme Danger (below -39°C): exposed skin can freeze in under 2 minutes.
At what wind chill temperature does frostbite occur?
According to Environment Canada, frostbite can occur within 30 minutes at a wind chill of -27°C to -39°C. At wind chill values below -39°C, exposed skin can freeze in under 10 minutes. The calculator shows colour-coded danger levels based on these thresholds.
Why does wind chill only apply at low temperatures?
Wind accelerates heat loss from exposed skin through convection. At temperatures above 10°C, the cooling effect is not significant enough to affect health risk. The formula is therefore only applied when the air temperature is 10°C or below and wind speed is at least 4.8 km/h.
Is Wind Chill Calculator free and private?
Yes. Wind Chill Calculator is completely free with no account required. All calculations run in your browser and nothing is uploaded or stored.
Does Wind Chill Calculator work on mobile?
Yes. Wind Chill Calculator is fully responsive and works in all modern browsers on desktop, mobile, and tablet.

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