Convert all weather measurement units in real time — temperature, wind speed, pressure, precipitation, and visibility — with the conversion formula shown for each result.
Convert units → Unit Converter
Temperature
Formulas
°F = °C × 9/5 + 32
K = °C + 273.15
°C = (°F − 32) × 5/9
°C = K − 273.15
Wind Speed
Formulas (base: m/s)
km/h = m/s × 3.6
mph = m/s × 2.23694
knots = m/s × 1.94384
Pressure
Formulas (base: hPa)
mmHg = hPa × 0.750062
inHg = hPa × 0.02953
atm = hPa / 1013.25
psi = hPa × 0.0145038
Precipitation
Formulas
inches = mm / 25.4
mm = inches × 25.4
Visibility
Formulas
miles = km / 1.60934
km = miles × 1.60934
Conversion references:
| Category | Units covered |
|---|---|
| Temperature | °C, °F, K — all three directions |
| Wind speed | m/s, km/h, mph, knots |
| Pressure | hPa/mbar, mmHg/Torr, inHg, atm, psi |
| Precipitation | mm, inches |
| Visibility | km, miles |
All conversions use standard meteorological definitions. Pressure base unit is hPa (hectopascal, equivalent to millibar), as used by most weather services worldwide.