Wind Chill Calculator
Calculate how cold it actually feels using the official NWS wind chill formula, with frostbite-time warnings.
Feels like
—
In Celsius —
Frostbite risk —
The NWS formula is defined for temperatures ≤ 50°F and winds ≥ 3 mph; outside that, air temperature is shown.
✉ Email me this result
</> Embed this calculator
Paste this into any website or blog post. It is free — the small "powered by" link must stay visible.
How it works
WC(°F) = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275T·V^0.16Frequently Asked Questions
How does wind make it feel colder?
Moving air strips away the thin warm layer your body maintains, accelerating heat loss. 20°F with a 25 mph wind feels like 3°F — and exposed skin cools as if it truly were 3°F.
When does frostbite become a risk?
Below about −18°F wind chill, exposed skin can freeze in 30 minutes; below −32°F in as little as 10 minutes. The calculator flags these thresholds.
Does wind chill affect cars or pipes?
It changes how fast objects cool to the air temperature, but never below it — a pipe in −5°F air with wind cannot get colder than −5°F, just gets there faster.