Enter the actual vapor density and the saturation vapor density into the calculator to determine the relative humidity.
- Specific Humidity Calculator
- Wet Bulb Calculator
- Water Vapor Pressure Calculator
- Vapor Pressure Calculator (Solvent/Solution)
Relative Humidity Formula
The following formula is used to calculate a relative humidity.
RH = VDa / VDs * 100
- Where RH is the relative humidity (%)
- VDa is the actual vapor density (g/m^3)
- VDs is the saturation vapor density (g/m^3)
FAQ
What is a relative humidity?
A relative humidity is a ratio of the vapor density to saturation vapor density. It’s a measure of how much water vapor air can hold compared to how much water vapor it takes to saturate the air at any given temperature.
What is a saturated air?
A saturated air is one at a 100% relative humidity and that at the specific temperature it cannot hold any more water vapor.
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