1. What is Dew Point?

The dew point is the temperature to which air must be cooled to become saturated with water vapor. When cooled further, water vapor will condense to form liquid water (dew).

2. How Does the Calculator Work?

The calculator uses the Magnus formula:

Where:

• \( Td \) — Dew point temperature (°C)
• \( e \) — Vapor pressure (hPa)
• 6.112 — Reference vapor pressure (hPa) at 0°C
• 243.04, 17.625 — Magnus formula coefficients

Explanation: The formula relates the dew point temperature to the water vapor pressure in the air.

3. Importance of Dew Point Calculation

Details: Dew point is important in meteorology for weather prediction, in aviation for fog formation, and in building science for assessing condensation risks.

4. Using the Calculator

Tips: Enter vapor pressure in hPa (hectopascals). The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between dew point and humidity?
A: Relative humidity depends on temperature, while dew point is an absolute measure of moisture in the air.

Q2: What does a high dew point indicate?
A: Higher dew points indicate more moisture in the air, which can feel more uncomfortable.

Q3: How is vapor pressure measured?
A: Vapor pressure can be calculated from relative humidity and temperature or measured directly with specialized instruments.

Q4: What are typical dew point ranges?
A: Below 10°C is dry, 10-16°C is comfortable, 16-18°C is humid, above 18°C is uncomfortable.

Q5: Why is dew point important in aviation?
A: When temperature approaches dew point, fog or clouds may form, affecting visibility.