Wind Chill Calculator
Calculate the wind chill (feels-like temperature) with this free online calculator. Enter temperature and wind speed to see the frostbite risk and time.
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How to use Wind Chill Calculator
- 1Choose °F and mph or °C and km/h
- 2Enter the air temperature and wind speed
- 3Read the wind chill and how quickly frostbite can occur
Frequently asked questions
What is wind chill?▾
Wind chill is how cold it feels on exposed skin when wind speeds up heat loss. At 20 °F with a 15 mph wind it feels like about 6 °F.
How is wind chill calculated?▾
This calculator uses the US National Weather Service formula from 2001. It applies at 50 °F (10 °C) or below and with wind of at least 3 mph (5 km/h).
When is wind chill dangerous?▾
At a wind chill of -18 °F (-28 °C) frostbite can develop on exposed skin in about 30 minutes, and at -35 °F (-37 °C) in about 10 minutes.
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