Wind Chill Calculator

Wind Chill – Quick Cheat Sheet

NWS (US) (°F, mph): WCT = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16 (valid if T ≤ 50°F and V ≥ 3 mph).
Environment Canada (°C, km/h): WCI = 13.12 + 0.6215T − 11.37V^0.16 + 0.3965TV^0.16 (valid if T ≤ 10°C and V ≥ 4.8 km/h).
Units: Choose Imperial for °F/mph or Metric for °C/km/h. The other system is shown for reference.
Risk bands: Informational only. Always follow local weather advisories.
Tip: At very low winds (below validity threshold), the formulas are not reliable—use actual air temperature.

Notes & assumptions

Wind speed is assumed at face level (≈10 m standardized wind measurements typically require adjustments).
Results are rounded for readability; display precision does not imply accuracy at that resolution.
This tool does not account for sun exposure, humidity, or clothing—wind chill is a simplified model.