justyourcalculatorWind Chill Calculator
How cold it feels on exposed skin, and how fast frostbite can set in.
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Wind Chill Calculator
Feels-like temperature in cold wind
Wind chill
6 °F
Feels 14 degrees colder than the air (-14.3 °C)
- Frostbite risklow risk of frostbite, dress warmly
- Moderate
- Air temperature
- 20 °F
- Wind speed
- 15 mph
National Weather Service wind chill formula (2001), T in °F and V in mph at 5 ft height. Frostbite times follow Environment Canada's guidance for healthy adults.
How it was calculated
- WC = 35.74 + 0.6215T - 35.75V^0.16 + 0.4275TV^0.16
- = 35.74 + 0.6215 × 20 - 35.75 × 15^0.16 + 0.4275 × 20 × 15^0.16 = 6.22 °F
| Wind | Wind chill | Frostbite risk |
|---|---|---|
| 5 mph | 13 °F | Moderate |
| 10 mph | 9 °F | Moderate |
| 15 mph | 6 °F | Moderate |
| 20 mph | 4 °F | Moderate |
| 25 mph | 3 °F | Moderate |
| 30 mph | 1 °F | Moderate |
| 35 mph | 0 °F | Moderate |
| 40 mph | -1 °F | Moderate |
| 45 mph | -2 °F | Moderate |
| 50 mph | -3 °F | Moderate |
| 55 mph | -3 °F | Moderate |
| 60 mph | -4 °F | Moderate |
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How the wind chill calculator works
Wind carries heat away from skin faster than still air, so it feels colder than the thermometer says. The NWS formula is WC = 35.74 + 0.6215T - 35.75V^0.16 + 0.4275TV^0.16, with T in °F and V the wind speed in mph.
It is defined for temperatures at or below 50 °F (10 °C) and wind speeds of at least 3 mph. Wind chill affects people and animals, not objects: water won't freeze above 32 °F no matter the wind.
Using and checking your result
Published by JustYourCalculator. Check the units and assumptions above, and compare a known example before relying on the output. Calculations use browser arithmetic and may round displayed values.
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