This calculator figures out what the temperature actually feels like based on how windy it is and the current air temperature.

Wind Chill Calculator · NOAA precision

🌡️❄️ Wind Chill Calculator NOAA formula · °C & °F

Accurate perceived temperature · Input in °C or °F · Wind in mph, km/h, m/s

🌬️ Air temperature

💨 Wind speed

❄️ What is wind chill?

Wind chill is the cooling effect of wind combined with low temperature. It represents how cold humans feel, not the actual air temperature. Our calculator uses the current NOAA/NWS standard.

🧊 How wind chill works

Wind accelerates heat loss from exposed skin by removing the insulating layer of warm air. Stronger wind increases the cooling rate, making the environment feel significantly colder.

📐 Formula explanation

WC (°F) = 35.74 + 0.6215·T – 35.75·(V^0.16) + 0.4275·T·(V^0.16) where T = air temp (°F), V = wind speed (mph). Valid for T ≤ 50°F and wind > 3 mph. All unit conversions are automatic.

⚠️ Why it matters

Knowing wind chill helps prevent frostbite and hypothermia. Athletes, outdoor workers, and winter travellers use it to plan clothing and exposure limits.

📋 Example

Air -5°C (23°F) with wind 25 km/h (15.5 mph) → wind chill 10°F (-12°C) → risk: very cold, frostbite possible in 30 minutes.

Frequently asked questions

🌬️ What is wind chill exactly?

Wind chill is the "feels‑like" temperature for humans. It combines actual air temperature with wind speed. It only applies below 50°F (10°C) and with wind above 3 mph.

🧮 How is wind chill calculated in this tool?

We use the official NOAA formula. If you enter °C or km/h, the script converts them to °F and mph, calculates wind chill, then converts back to °C for display.

⏱️ At what wind chill does frostbite occur?

Frostbite can occur in 30 minutes when wind chill falls below -20°F (-29°C). At -40°F (-40°C) frostbite can happen in 5–10 minutes. Our risk indicator reflects these thresholds.