1. What is Gauge Pressure?

Gauge pressure is the pressure relative to atmospheric pressure. It represents the difference between absolute pressure and atmospheric pressure, and is commonly used in various engineering and scientific applications.

2. How Does the Calculator Work?

The calculator uses the gauge pressure formula:

Where:

• \( GP \) — Gauge Pressure (Pa)
• \( AP \) — Absolute Pressure (Pa)
• \( ATM \) — Atmospheric Pressure (Pa)

Explanation: Gauge pressure measures pressure above atmospheric pressure, with positive values indicating pressure higher than atmospheric and negative values indicating vacuum.

3. Importance of Gauge Pressure Calculation

Details: Accurate gauge pressure calculation is essential for pressure measurement systems, hydraulic systems, pneumatic systems, and various industrial processes where pressure monitoring is critical.

4. Using the Calculator

Tips: Enter absolute pressure and atmospheric pressure in Pascals (Pa). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between gauge pressure and absolute pressure?
A: Absolute pressure is measured relative to a perfect vacuum, while gauge pressure is measured relative to atmospheric pressure.

Q2: What are typical atmospheric pressure values?
A: Standard atmospheric pressure is 101,325 Pa (101.325 kPa), but it varies with altitude and weather conditions.

Q3: When is gauge pressure used instead of absolute pressure?
A: Gauge pressure is commonly used in applications where pressure relative to atmospheric is more relevant, such as tire pressure, blood pressure, and most pressure gauges.

Q4: Can gauge pressure be negative?
A: Yes, negative gauge pressure indicates pressure below atmospheric pressure (vacuum).

Q5: What units are used for pressure measurement?
A: Common units include Pascals (Pa), kilopascals (kPa), pounds per square inch (psi), and bar. This calculator uses Pascals.