Science & Engineering
Wind Chill Calculator
Estimate North American wind chill from cold air temperature and wind speed. The calculator uses wind chill °F = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16. It returns more than one result so you can check the main answer against a useful secondary measure. Wind chill estimates heat loss from exposed skin; it does not change the actual air temperature. The formula is intended for temperatures at or below 50°F and wind speeds above 3 mph; frostbite risk also depends on exposure and clothing.
Educational model only. Use applicable standards, calibrated measurements, and qualified review for safety-critical work.
Calculate and compare
Use the number box for precision or the slider for fast scenario testing.
Scenario results
Wind chill
-8.9 °F
North American wind chill index.
Cooling difference
18.9 °F
Air temperature minus wind chill.
Celsius equivalent
-22.7 °C
Converted apparent temperature.
How the calculation works
Use consistent units and retain full precision until the final display step.
Worked example
Reproduce the displayed scenario, then change one assumption at a time.
Assumptions behind the result
- • Inputs use the units shown beside each control.
- • The displayed formula is applied without hidden market or demographic data.
- • Rounding occurs only for display; calculations keep full numeric precision.
- • Wind chill estimates heat loss from exposed skin; it does not change the actual air temperature.
- • The formula is intended for temperatures at or below 50°F and wind speeds above 3 mph; frostbite risk also depends on exposure and clothing.
Mistakes that change the answer
- • Mixing percentages with decimals or mixing incompatible units.
- • Relying on a rounded intermediate value instead of the full result.
- • Changing several assumptions at once instead of testing air temperature separately.