1. What is Relative Humidity?

Relative humidity (RH) is the ratio of the current amount of water vapor in the air to the maximum possible amount at that temperature, expressed as a percentage. It's a crucial parameter in meteorology, HVAC, and many industrial processes.

2. How Does the Calculator Work?

The calculator uses the simplified formula:

Where:

• \( RH \) — Relative humidity (percentage)
• \( T_{dry} \) — Dry bulb temperature (°C)
• \( T_{wet} \) — Wet bulb temperature (°C)

Explanation: This formula provides a quick estimation of relative humidity by comparing the difference between dry and wet bulb temperatures. The greater the difference, the lower the relative humidity.

3. Importance of Relative Humidity

Details: Relative humidity affects human comfort, building materials, industrial processes, and weather patterns. It's essential for HVAC design, agriculture, and health monitoring.

4. Using the Calculator

Tips: Enter both dry and wet bulb temperatures in Celsius. The wet bulb temperature should be equal to or lower than the dry bulb temperature. For accurate results, ensure proper measurement conditions.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between dry and wet bulb temperatures?
A: Dry bulb measures ambient air temperature, while wet bulb measures temperature with a thermometer wrapped in a wet cloth, indicating evaporative cooling potential.

Q2: How accurate is this simplified formula?
A: It provides a reasonable estimate but may have ±5% error compared to more complex psychrometric calculations.

Q3: What are typical comfortable RH levels?
A: For human comfort, 30-60% RH is generally recommended, with 40-50% being ideal for most indoor environments.

Q4: When is this formula most accurate?
A: It works best in normal temperature ranges (10-30°C) and moderate humidity conditions.

Q5: How does RH affect perceived temperature?
A: High RH makes warm temperatures feel hotter (reduced evaporative cooling), while low RH can make cold temperatures feel colder.