Wind Chill Calculator
The number that actually decides how a Canadian winter day feels. Uses the Environment Canada wind chill formula, not a guess.
Your results
Worked example
-10 C with a 30 km/h wind
13.12 + 0.6215(-10) - 11.37(30^0.16) + 0.3965(-10)(30^0.16) = -19.5 C. It feels like about -20 C on exposed skin, in the moderate frostbite risk band.
How this calculator works
Environment Canada's formula: wind chill = 13.12 + 0.6215T - 11.37V^0.16 + 0.3965T V^0.16, with T in Celsius and V in km/h measured at 10 metres. It models heat loss from exposed skin; it does not apply to objects, pipes or vehicles, which never cool below air temperature.
The formula is defined for temperatures at or below 10 C and winds above 5 km/h. Outside that range, wind chill equals air temperature and this page says so rather than extrapolating.
Common questions
Can wind chill freeze my pipes or car?
No. Wind makes things reach air temperature faster, but nothing cools below the actual air temperature. Wind chill describes exposed human skin only. Your car cares about the thermometer, not the wind chill.
Why do Canadian and American wind chills match?
Both countries adopted the same joint formula in 2001. Only the units differ: Canada reports Celsius and km/h, the US reports Fahrenheit and mph, so this calculator shows both scales.
How fast can frostbite happen at -20 wind chill?
In the -10 to -27 band, exposed skin can freeze in 10 to 30 minutes. Cover cheeks, ears and fingers; children and older adults freeze faster.
Guidance only, based on the Environment Canada wind chill model and its published frostbite risk bands. In severe cold, follow official weather warnings.