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Wind Chill Calculator

🌬️Wind Chill Calculator

Must be ≤ 10°C / 50°F

Must be > 4.8 km/h

What is Wind Chill Calculator?

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Wind chill is the perceived decrease in temperature felt by exposed skin due to airflow. Wind increases the rate of heat loss by continuously replacing the layer of warm air near the skin with cooler ambient air. The Environment Canada / NWS formula (2001) uses wind speed and air temperature to calculate the apparent feels-like temperature. It applies when the actual temperature is ≤ 10°C and wind speed > 4.8 km/h.

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Formula

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f(x)Metric (°C, km/h): WC = 13.12 + 0.6215T − 11.37V^0.16 + 0.3965T×V^0.16

Variable Legend

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SymbolNameUnitDescription
C13—13
WC35—35
VV value—Variable used in the calculation

How to Wind Chill Calculator

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  1. 1Metric (°C, km/h): WC = 13.12 + 0.6215T − 11.37V^0.16 + 0.3965T×V^0.16
  2. 2Imperial (°F, mph): WC = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275T×V^0.16
  3. 3V^0.16 is the key term — wind speed has diminishing returns
  4. 4Developed by Environment Canada and the US NWS in 2001
  5. 5Not applicable above 10°C/50°F — no cooling effect from wind when air is warm

Worked Examples

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Example 1
Given:−5°C air, 30 km/h wind
Result:Wind chill ≈ −14°C

Exposed skin can freeze in 30 minutes

Example 2
Given:0°C air, 20 km/h wind
Result:Wind chill ≈ −5°C

Wind Chill Frostbite Risk (Environment Canada)

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Wind ChillRiskTime to Frostbite
0 to −9Low risk
−10 to −27Low risk
−28 to −39High risk10–30 minutes
−40 to −47Very high risk5–10 minutes
−48 to −54Extreme risk2–5 minutes
< −55Extreme danger< 2 minutes

Frequently Asked Questions

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Q

What is Wind Chill Calc?

A

Wind chill is the perceived decrease in temperature felt by exposed skin due to airflow. Wind increases the rate of heat loss by continuously replacing the layer of warm air near the skin with cooler ambient air

Q

How accurate is the Wind Chill Calc calculator?

A

The calculator uses the standard published formula for wind chill calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

Q

What units does the Wind Chill Calc calculator use?

A

This calculator works with inches, kilometres, miles per hour, kilometres per hour. You can enter values in the units shown — the calculator handles all conversions internally.

Q

What formula does the Wind Chill Calc calculator use?

A

The core formula is: Metric (°C, km/h): WC = 13.12 + 0.6215T − 11.37V^0.16 + 0.3965T×V^0.16. Each step in the calculation is shown so you can verify the result manually.

Mathematically verified
Reviewed October 2026
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