Dew Point Temperature Calculator

Dew Point Temperature Formula:

\[ T_d = \frac{243.5 \times \ln(e / 6.112)}{17.67 - \ln(e / 6.112)} \]

where:

\[ e = \frac{RH}{100} \times 6.112 \times e^{\left(\frac{17.67 \times T}{T + 243.5}\right)} \]

Dew Point Temperature (T_d):

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1. What is Dew Point Temperature?

Definition: The dew point temperature is the temperature at which air becomes saturated with water vapor and dew begins to form.

Purpose: It's used in meteorology, HVAC systems, and industrial processes to understand moisture content in the air.

2. How Does the Calculator Work?

The calculator uses the Magnus formula:

\[ T_d = \frac{243.5 \times \ln(e / 6.112)}{17.67 - \ln(e / 6.112)} \]

where vapor pressure (e) is calculated as:

\[ e = \frac{RH}{100} \times 6.112 \times e^{\left(\frac{17.67 \times T}{T + 243.5}\right)} \]

Where:

\( T_d \) — Dew point temperature (°C)
\( T \) — Air temperature (°C)
\( RH \) — Relative humidity (%)
\( e \) — Vapor pressure (hPa)

3. Importance of Dew Point Temperature

Details: Knowing the dew point helps predict fog, frost, and condensation. It's also critical for comfort assessment and preventing moisture damage.

4. Using the Calculator

Tips: Enter the current air temperature in °C and relative humidity in % (0-100). The calculator will compute the dew point temperature.

5. Frequently Asked Questions (FAQ)

Q1: What does a high dew point indicate?
A: High dew points (>18°C) indicate muggy conditions with more moisture in the air.

Q2: Can dew point be higher than temperature?
A: No, the dew point cannot exceed the current air temperature.

Q3: Why is dew point important for aviation?
A: It helps predict fog formation and potential icing conditions.

Q4: How does dew point affect human comfort?
A: Higher dew points make the air feel more oppressive, even at moderate temperatures.

Q5: What's the relationship between dew point and humidity?
A: Dew point is an absolute measure of moisture, while relative humidity depends on temperature.