1. What is Dew Point?

The dew point is the temperature at which air becomes saturated with water vapor, causing dew to form. It's a measure of atmospheric moisture and helps predict fog, frost, and comfort levels.

2. How Does the Calculator Work?

The calculator uses the dew point approximation formula:

Where:

• \( Td \) — Dew point temperature (°C)
• \( Tw \) — Wet bulb temperature (°C)
• \( Td \) — Dry bulb temperature (°C)

Explanation: This simple approximation estimates dew point from the difference between wet and dry bulb temperatures, which is related to humidity.

3. Importance of Dew Point Calculation

Details: Dew point is crucial for weather forecasting, HVAC system design, industrial processes, and understanding human comfort in different climates.

4. Using the Calculator

Tips: Enter both wet bulb and dry bulb temperatures in Celsius. The wet bulb temperature should always be equal to or lower than the dry bulb temperature.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this approximation?
A: It provides a reasonable estimate but may differ from precise psychrometric calculations by 1-2°C in typical conditions.

Q2: What's the difference between dew point and humidity?
A: Dew point is an absolute measure of moisture, while relative humidity depends on both moisture content and air temperature.

Q3: When is dew point most useful?
A: Particularly valuable when temperatures are high, as it better indicates discomfort than relative humidity alone.

Q4: What does a high dew point indicate?
A: Values above 18°C (65°F) feel humid, above 21°C (70°F) feel oppressive, and above 24°C (75°F) are dangerous for strenuous activity.

Q5: Can dew point be higher than air temperature?
A: No, by definition. When air temperature drops to the dew point, condensation occurs.