Wind Chill Calculator

Calculate the wind chill factor based on temperature and wind speed using the NWS formula.

Unit system

Result

Fill in the fields above, then press Calculate.

A wind chill calculator estimates how cold it feels when wind is factored in, using the NOAA wind chill formula for exposed skin.

Select your unit system, enter the air temperature and wind speed. The calculator uses the National Weather Service (NWS) formula to compute the wind chill index and frostbite risk.

Examples

Cold winter day

Temperature: 20°F, Wind: 25 mph. Wind Chill = 35.74 + 0.6215(20) - 35.75(25^0.16) + 0.4275(20)(25^0.16) = 6.2°F. Feels 13.8°F colder.

Dangerous conditions

Temperature: 0°F, Wind: 30 mph. Wind Chill = -26.2°F. Frostbite possible in 10 minutes on exposed skin.

Frequently Asked Questions

What does wind chill actually measure?
Wind chill measures how cold it "feels" on exposed skin due to the combined effect of cold air and wind. Wind increases the rate of heat loss from the body, making it feel colder than the actual air temperature.
Can wind chill freeze water pipes?
No. Wind chill affects how quickly an object (or person) cools to the ambient air temperature, but cannot cool anything below the actual air temperature. Pipes freeze based on the actual temperature, not wind chill.
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Quick Tips

  • •Wind chill only applies when it is 50°F (10°C) or colder with wind speeds of 3+ mph.
  • •Dress in layers and cover exposed skin when wind chill drops below 0°F (-18°C).
  • •The NWS formula was updated in 2001 based on modern research on heat loss from the human face.