Weather & air
Wind chill calculator
Estimate the NWS wind-chill index within its stated input range.
A clear answer. Here’s how.
Converts to °F and mph, then applies the NWS equation 35.74+0.6215T−35.75V^0.16+0.4275TV^0.16. Requires air temperature ≤10°C and wind greater than 3 mph. Reports the equivalent index in °C and °F, without predicting exposure duration, frostbite or individual thermal response.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Air temperature (°C)
- 0
- Wind speed (km/h)
- 20
Example result
- Wind-chill index (°C)
- -5.2231109662
- Wind-chill index (°F)
- 22.5984002608