Wind Chill Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
Conditions
Result
Enter the temperature and wind speed to see the result.
Estimates from standard published formulas for general use — not an official weather forecast or medical guidance. Calculations run entirely in your browser.
How to use this calculator
- Enter the air temperature and choose °C or °F.
- Enter the wind speed and pick km/h, mph or m/s.
- Read the feels-like wind-chill temperature and the frostbite-risk guidance.
How it works
The Wind Chill Calculator estimates how cold the air feels on exposed skin once wind is factored in, using the standard Environment Canada / US National Weather Service formula. It shows the result in both °C and °F and rates the frostbite risk.
Wind chill (°C) = 13.12 + 0.6215·T − 11.37·V^0.16 + 0.3965·T·V^0.16, where T is the air temperature in °C and V is the wind speed in km/h. The formula is defined for temperatures of 10 °C or below and winds of at least 4.8 km/h; outside that range it simply feels like the actual air temperature.
Worked example
−20 °C with a 30 km/h wind. At −20 °C with a 30 km/h wind the air feels like about −33 °C — a high-risk level where frostbite is possible on exposed skin within 10–30 minutes.
Tips
- Cover exposed skin (face, ears, hands) first — that is where frostbite starts.
- Wind chill is a guide for comfort and safety, not the temperature water freezes at.
Frequently asked questions
What is wind chill?
Wind chill is how cold the air feels on bare skin once moving air is taken into account. Wind strips away the thin layer of warmth around your body, so it feels colder than the thermometer reading.
Why doesn't wind chill apply on warm or calm days?
The formula is only defined for 10 °C or below and winds of at least 4.8 km/h. Above that temperature, or in near-calm air, there is no meaningful wind-chill effect, so it feels like the actual air temperature.
Does wind chill affect cars or objects?
No. Wind chill only describes how cold it feels to people and animals losing body heat. An object can never get colder than the air temperature, no matter how strong the wind.
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Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.