Wind Chill Calculator · Practical guide
Wind Chill Calculator in Celsius
Enter °C and km/h directly — the calculator handles the conversion and shows metric frostbite risk.
At a glance
Wind Chill Works in Celsius Too
Select Metric (°C, km/h) above and enter your local values — no manual conversion needed. For example, −10°C with a 30 km/h wind feels like −19.5°C. Internally the tool converts to the North American formula and converts back, so metric and imperial results are exactly consistent.
Interactive tool
Wind Chill Calculator
Enter your own values, then compare the result with the examples below.
Wind Chill Results
The Formula, for Reference
The standard North American formula is defined in °F and mph: WCT = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16. The calculator converts °C to °F and km/h to mph (dividing by 1.60934), runs the formula, and converts the result back to Celsius. A wind chill of −19.5°C equals −3.1°F.
Metric Wind Chill Examples
| Air temp (°C) | Wind (km/h) | Wind chill (°C) | Frostbite risk |
|---|---|---|---|
| 5°C | 15 km/h | 1.8°C | Low |
| 0°C | 30 km/h | −6.5°C | Low |
| −10°C | 30 km/h | −19.5°C | Low |
| −20°C | 40 km/h | −34.1°C | ~30 minutes |
| −30°C | 50 km/h | −49.0°C | ~5 minutes |
Metric Validity Limits and Frostbite Thresholds
The formula is valid only for temperatures at or below 10°C and wind speeds at or above 5 km/h — the metric equivalents of 50°F and 3 mph. The frostbite thresholds translate as follows: 30-minute risk at a wind chill of about −28°C, 10-minute risk at −38°C, and 5-minute risk at −48°C. The calculator displays the risk label automatically alongside the Celsius result.
Frequently Asked Questions
What is the wind chill at −10°C with 30 km/h wind?
About −19.5°C. Converting through the North American formula: −10°C is 14°F, 30 km/h is 18.6 mph, which yields −3.1°F, or −19.5°C.
Is the Celsius formula different from the Fahrenheit one?
No. The standard wind chill equation is defined in Fahrenheit and mph; metric values are converted in and out, so results are identical either way you enter them.
What wind chill in Celsius causes frostbite in 30 minutes?
A wind chill of about −28°C (−19°F) or colder. At −38°C the risk time drops to about 10 minutes, and at −48°C to about 5 minutes.
Why do I get N/A for mild temperatures in metric?
The formula only applies at or below 10°C with wind of at least 5 km/h. In milder conditions, wind chill is not meaningfully different from the air temperature.