1. What is a Water Saturation Pressure Calculator?

Definition: This calculator computes the water vapor saturation pressure based on temperature using the Magnus formula.

Purpose: It helps meteorologists, engineers, and scientists determine the maximum water vapor pressure at a given temperature.

2. How Does the Calculator Work?

The calculator uses the Magnus formula:

Where:

• \( P \) — Water saturation pressure (hPa)
• \( T \) — Temperature (°C)
• \( e \) — Euler's number (~2.71828)

Explanation: The formula approximates the relationship between temperature and the maximum water vapor pressure in the air.

3. Importance of Water Saturation Pressure

Details: This calculation is essential for weather forecasting, humidity measurements, and various engineering applications involving air-water systems.

4. Using the Calculator

Tips: Simply enter the temperature in Celsius. The calculator will compute the saturation vapor pressure in hectopascals (hPa).

5. Frequently Asked Questions (FAQ)

Q1: What is water saturation pressure?
A: It's the maximum vapor pressure water can have at a given temperature before condensation occurs.

Q2: Why is this calculation important?
A: It's fundamental for understanding humidity, dew point, and various atmospheric processes.

Q3: How accurate is the Magnus formula?
A: It's accurate to within ±0.4% for temperatures between -20°C and +50°C.

Q4: What are typical values?
A: At 20°C it's about 23.4 hPa, at 30°C about 42.4 hPa, and at 0°C about 6.1 hPa.

Q5: Can this be used for sub-zero temperatures?
A: Yes, the formula works for temperatures below freezing, though accuracy decreases below -20°C.