Wind Chill Calculator - Calculator See


Wind Chill Calculator

Calculate winter perceived cold temperature and frostbite exposure risk based on ambient temperature and wind speed.

Calculator Inputs

°F
Air temperature (must be <= 50°F).
mph
Sustained wind speed (must be >= 3 mph).

Calculated Results

Wind Chill Index
9.0°F (-12.8°C)
Temperature Drop from Wind -16.0°F colder
Frostbite Danger Level Low Risk (> 30 minutes)
Wind Chill in Celsius -12.8°C
Values calculate live as you adjust inputs.

About Wind Chill Calculator

The National Weather Service (NWS) Wind Chill temperature index measures the accelerated rate of body heat loss caused by wind combining with sub-freezing cold air.

What is Wind Chill Calculator?

The National Weather Service (NWS) Wind Chill temperature index measures the accelerated rate of body heat loss caused by wind combining with sub-freezing cold air.

How to Use This Calculator

  1. Enter air temperature in °F (50°F or lower).
  2. Enter sustained wind speed in mph.
  3. Review apparent temperature feel and frostbite risk.

The Mathematical Formula & Variables

Wind Chill (°F) = 35.74 + 0.6215*T - 35.75*(V^0.16) + 0.4275*T*(V^0.16)

Step-by-Step Worked Example

Scenario: 25°F air temperature with a 20 mph wind.

  1. Plug into NWS formula: 35.74 + (0.6215 * 25) - (35.75 * 20^0.16) + (0.4275 * 25 * 20^0.16).
  2. Resulting wind chill temperature = 9.0°F.

Result: Wind Chill: 9.0°F

Frequently Asked Questions

At what wind chill temperature does frostbite occur in under 30 minutes?

When the wind chill index falls to -18°F (-28°C) or colder, frostbite on exposed skin can occur within 30 minutes or less.