Temperature Humidity Dew Point Calculator

Dew Point Formula:

\[ T_d = \frac{b \times \gamma}{a - \gamma} \] \[ \gamma = \ln\left(\frac{RH}{100}\right) + \frac{a \times T}{b + T} \]

Temperature (T):

°C

Relative Humidity (RH):

Constant (a):

Constant (b):

Dew Point Temperature (T_d):

Definition: This calculator determines the dew point temperature based on air temperature and relative humidity using the Magnus formula.

Purpose: It helps meteorologists, HVAC professionals, and others understand when and where condensation will occur.

The calculator uses the Magnus formula:

\[ T_d = \frac{b \times \gamma}{a - \gamma} \] \[ \gamma = \ln\left(\frac{RH}{100}\right) + \frac{a \times T}{b + T} \]

Where:

Explanation: The formula approximates the relationship between temperature, humidity, and the dew point.

Details: Knowing the dew point helps predict fog, frost, condensation, and is crucial for climate control and industrial processes.

Tips: Enter the air temperature in °C, relative humidity (0-100%), and constants a (default 17.27) and b (default 237.7).

Q1: What is dew point temperature?
A: The temperature at which air becomes saturated with water vapor and dew forms.

Q2: Why are constants a and b needed?
A: These are empirical constants that make the Magnus formula accurate for typical atmospheric conditions.

Q3: When would I change the constants?
A: For extreme temperatures or specialized applications, different constants might be used.

Q4: How accurate is this calculation?
A: The Magnus formula is accurate to within about ±0.4°C for temperatures between 0°C and 60°C.

Q5: What does a high dew point indicate?
A: High dew points indicate moist air and greater discomfort in warm weather.