Wind Chill Calculator

Selects which agency coefficient set is used; each is published for its own unit system.
Degrees Fahrenheit in imperial mode, degrees Celsius in metric mode.
Miles per hour in imperial mode, kilometres per hour in metric mode, measured at the standard 10 m height.
Wind chill temperature
-17.4
Wind Chill Calculator
Wind chill (degF)
-17.4 degF
Wind chill (degC)
-27.4 degC
Wind chill, reported as the weather service rounds it
-17
Degrees colder than the air temperature (degF)
22.4 degF
Degrees colder than the air temperature (degC)
12.4 degC
Siple-Passel wind chill index
1,824 W/m2
Within the published applicability range
yes
Coefficient set used
Fahrenheit and mph (NWS coefficients)
Worked out from US National Weather Service, "Wind Chill" calculation sheet (NWS El Paso wxcalc) and 2 other sources.

How this is worked out

4 steps
  1. V^0.16 = 25^0.16 = 1.6736722
  2. Twc = 35.74 + 0.6215(5) - 35.75(1.6736722) + 0.4275(5)(1.6736722)
  3. Twc = -17.4088 degF = -27.4493 degC
  4. The air feels 22.41 degF colder than the 5 degF air temperature.

Results are general information, not financial, tax, legal, medical or engineering advice.