Wind Chill Calculator

Calculate apparent wind chill temperature and frostbite risk from air temperature and wind speed using the official NWS formula.

How to use this calculator

1. Select unit system.
2. Enter air temp ≤ 50°F and wind speed.
3. Read feels-like temp and frostbite risk.

Formula & method

NWS Wind Chill Formula

W = 35.74 + 0.6215*T - 35.75*(V^0.16) + 0.4275*T*(V^0.16)

NWS cold index.

Example

30°F with 15 mph wind = 19.3°F wind chill.

Key insights

• Valid for temperatures ≤ 50°F (10°C).

How to interpret your result

Frostbite Risk

Time exposure risk for skin.

Frequently asked questions

Does wind chill affect objects?

Coolers objects faster, but not below air temp.

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