Wind Chill Calculator

Calculate wind chill

Wind chill is the temperature it feels like on exposed skin when wind is factored in, because moving air carries heat away from the body faster than still air. This calculator uses the official formula adopted by the United States National Weather Service, which combines the air temperature in Fahrenheit and the wind speed in miles per hour. At twenty degrees Fahrenheit with a twenty mile per hour wind, it feels like about four degrees, sixteen degrees colder than the air temperature.

The formula applies at wind speeds of three miles per hour or more; below that, wind chill is simply the air temperature.

Why wind chill matters

Wind chill is an important safety measure in cold weather, because the faster heat loss it describes increases the risk of frostbite and hypothermia. Weather services issue wind chill warnings when the feels-like temperature drops to dangerous levels. Knowing the wind chill helps you dress appropriately and judge how long it is safe to be outside.

The result is shown in both Fahrenheit and Celsius. Wind chill only describes heat loss from exposed skin, so it is most relevant for how cold you will feel outdoors. All calculation happens locally in your browser.

Related tools

• User Agent Parser — Parse a User-Agent string into browser, engine, operating system and device. Explains why UA strings are unreliable and what to use instead.
• QR Code Generator — Generate QR codes for URLs, text, Wi-Fi and contact details. Adjustable error correction and size, produced entirely in your browser.
• Credit Card Validator — Validate a card number with the Luhn algorithm and identify the issuing network from its prefix. Runs locally, nothing is transmitted.
• Text Case Converter — Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case and sentence case. Runs entirely in your browser.