Valid entries are, air temperatures greater than 80 ☏ ( 27 ☌ ), dew point temperatures greater than 65 ☏ ( 12 ☌ ), and relative humidities higher than 40 percent.Įnter in the air temperature ( T air ) and the dew point temperature ( T dp ) in degrees Celsius, then click on the Calculate HI to compute the heat index ( HI).Įnter in the air temperature ( T air ) the dew point temperature ( T dp ) in degrees Fahrenheit, then click on the Calculate HI to compute the heat index ( HI).Įnter in the air temperature ( T air ) in degrees Celsius and relative humidity ( RH ) in percent ( without the % sign ), then click on the Calculate HI to compute the heat index ( HI ).Įnter in the air temperature ( T air ) in degrees Fahrenheit and relative humidity ( RH ) in percent ( without the % sign ), then click on the Calculate HI to compute the heat index ( HI ). Study Physics Dew Point Calculator This calculator determines the dew point from a given temperature and relative humidity of the air. Relative Humidity Calculation using degrees CelsiusĮnter in the air temperature ( T air ) and dew point temperature ( T dp) in degrees Celsius ( oF ) then click on the Calculate RH to compute the relative humidity ( RH ). Relative Humidity Calculation using degrees FahrenheitĮnter in the air temperature ( T air ) and dew point temperature ( T dp) in degrees Fahrenheit ( oF ) then click on the Calculate RH to compute the relative humidity ( RH ). Wind Chill/Temperature Index Calculation in degrees CelsiusĮnter in the air temperature ( T air ) in degrees Celsius and wind speed in miles per hour, then click on the Calculate WC to compute the windchill ( WC ). Wind Chill/Temperature Index Calculation in degrees FahrenheitĮnter in the air temperature ( T air ) in degrees Fahrenheit and wind speed in mile per hour ( mph ), then click on the Calculate WC to compute the windchill ( WC ).įor more information about windchill (ie. Temperature Conversion Enter a number then click on the appropriate number to see the result. You may edit any green background input.Great thanks to Ron Murphy of WFO Binghamton NY for writing all of the code used on this page!įor more information about the indices and equations used As recommended by Alduchov and Eskridge, the value of these are: a 17.625 and b 243. The tool below helps convert between Dew Point, Volume Concentration and Relative Humidity. The formula is: Td (b × (T,RH)) / (a (T,RH)) where: Td is the dew point in degrees Celsius T is the temperature in degrees Celsius RH is the relative humidity of the air in percent a and b are the Magnus coefficients. When the moisture content remains constant and temperature increases, relative humidity decreases, but the dew point remains constant. The Elcometer 114 Dewpoint Calculator provides accurate values of Dewpoint and Relative Humidity (RH) from the wet and dry bulb temperatures measured by a. These 3 ways of indicating Moisture quantities in a gas sample are linked together by well established formulas. A relative humidity of 100 indicates the dew point is equal to the current temperature and that the air is maximally saturated with water. This function inverts the Bolton1980 formula for saturation vapor pressure to instead calculate the temperature. It is particularly important to differentiate Volume Concentration and Relative Humidity: a Relative Humidity of 32% corresponds to a Moisture volume concentration of 1%. a RH of 25% means that the gas could hold 4 time more water vapor at this temperature without condensation.
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