Dew point to rh converter

The value for absolute humidity is returned as part of the results of the calculation, but it is relative humidity that is widely used in everyday life and is used as part of the calculation of dew point temperature. Absolute humidity is the measurement of the water content in the air, typically in units of grams per cubic meter. It is calculated by dividing the total mass of water vapor by the volume of the air.

Given the same amount of water vapor in the air, the absolute humidity does not change with the temperature at a fixed volume. If the volume is not fixed, as in the atmosphere, absolute humidity changes in response to the volume changes caused by the temperature and pressure variation. Relative humidity compares the current ratio of absolute humidity to the maximum humidity for a given temperature and expresses this value as a percentage.

The higher the percentage, the higher the humidity. It is affected by both temperature and pressure. Given the same amount of water vapor, there will be a higher relative humidity in cool air than there is in warmer air. The equations used may be found on a data sheet. Type the value you want to convert into the field, behind which you find the unit.

Click on any empty space in the window or the "calculate" button. Read the result in the other fields. Use the "reset" button to reset your calculation. For this calculation the temperature in degree Celsius and the pressure in hPa are needed.

Without a new entry standard values are used. After the calculation, the radio button in front of the input value is selected. Increase sample temperature or reduce input humidity. Calculated water vapour pressure higher than total pressure. Increase sample pressure or reduce input humidity.

Calculated water vapour or saturation vapour pressure is negative. Input parameters out of range. Water Vapour Pressure 0 Pa. Saturation Vapour Pressure 0 Pa. Moisture Volume 0 ppmV. Moisture Weight 0 ppmW. Water Activity 0. Gas Type [? Weight [? Michell Humidity Calculator Settings Displayed results. Dew Point.