Average sea level pressure is 1013.25 millibars (29.92 inches of mercury, 760 millimeters of mercury).Īlthough shown here as "windspeed" this calculator could just as well be used to convert "boatspeed." For more information about wind and wind scales go here.įor more information about time ( UTC, GMT, Z ) go here. Humidity is the ratio of the actual moisture content of the air at a specific temperature to the maximum amount that the air could hold at that temperature.īarometers measure air pressure in "millibars" (mb), "inches of mercury" (in) or "millimeters of mercury" (mm). total air temperature, TAT (kelvins or degrees Rankine) Mach number ratio of specific heats, approx 1.400 for dry air. To convert Celsius to Fahrenheit you will have to multiply by 9, divide by 5, and then add 32 (C x 9 / 5 + 32). Relative Humidity Calculator Temperature = Note: air temperature must be greater than 80 ☏ ( 27 ☌ ) and relative humidity must be higher than 40 percent. Heat Index is the temperature that it "feels like" based on actual temperature and humidity. For more information about wind chill go here. The "new" wind chill reflects the 2000-2001 National Weather Service update to the original ("old") 1945 index. Enter value, select unit and click on calculate. Concept of Air Velocity can be used in air conditioning, heating and ventilating work. Volume flow is usually measured in Cubic Feet per Minute (CFM). Wind Chill is the temperature that it "feels like" based on actual temperature and wind speed. By multiplying air velocity by the cross section area of a duct, you can determine the air volume flowing past a point in the duct per unit of time. Wind Chill Calculator Air Temperature (☏) = Wind Speed (MPH) = For more information about temperature go here.
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