Wind Chill Calculator
How cold it actually feels in the wind.
Enter your values
Enter the air temperature in °F.
Enter the wind speed in mph.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Feels like
- 6.2 °F
- In Celsius
- -14.3 °C
- Difference from air temp
- -13.8 °F
- Frostbite risk on exposed skin
- Low risk
Working
- 1T_wc = 35.74 + 0.6215(20) − 35.75(15)^0.16 + 0.4275(20)(15)^0.16 = 6.2 °F
Quick answer
Wind chill uses the 2001 NWS formula and applies at 50°F or below with winds above 3 mph.
T_wc = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16
At a glance
| What it does | How cold it actually feels in the wind. |
|---|---|
| Category | Weather |
| Inputs needed | Air temperature, Wind speed |
| Main output | Feels like |
| Formula | T_wc = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16 |
| Cost | Free — no sign-up, no download |
How to use the Wind Chill Calculator
- 1Enter the air temperature in Fahrenheit.
- 2Enter the wind speed in mph.
- 3Read the feels-like temperature and frostbite risk.
Inputs explained
- Air temperature(°F)
- Enter the air temperature in °F.
- Wind speed(mph)
- Enter the wind speed in mph.
Worked example
Using the values the calculator loads with:
Inputs
- Air temperature20 °F
- Wind speed15 mph
Results
- Feels like6.2 °F
- In Celsius-14.3 °C
- Difference from air temp-13.8 °F
- Frostbite risk on exposed skinLow risk
- T_wc = 35.74 + 0.6215(20) − 35.75(15)^0.16 + 0.4275(20)(15)^0.16 = 6.2 °F
Frequently asked questions
Does wind chill affect cars or pipes?
No. Wind chill only describes heat loss from exposed skin — objects cool faster but never below the air temperature.
When does the formula apply?
At 50°F or below with wind above 3 mph; outside that range it isn't meaningful.
What do I need to enter into the Wind Chill Calculator?
Just 2 values: air temperature, wind speed. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Wind Chill Calculator work out the answer?
Wind chill uses the 2001 NWS formula and applies at 50°F or below with winds above 3 mph. It applies the formula T_wc = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16 and shows the working so you can check each step by hand.
Is the Wind Chill Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.