Home
Back
Pressure Formula:
| From: | To: |
The pressure formula calculates the pressure at any point in a liquid using the relationship between density, gravitational acceleration, and pressure head. This fundamental principle in fluid mechanics helps determine the pressure exerted by a liquid column.
The calculator uses the pressure formula:
Where:
Explanation: The formula demonstrates that pressure in a fluid increases linearly with depth and depends on the fluid's density and gravitational acceleration.
Details: Accurate pressure calculation is crucial for designing hydraulic systems, understanding fluid behavior in containers, engineering applications involving liquids, and various scientific calculations in fluid mechanics.
Tips: Enter density in kg/m³, acceleration due to gravity in m/s² (default is 9.8 m/s²), and pressure head in meters. All values must be positive numbers.
Q1: What units should I use for the inputs?
A: Use kg/m³ for density, m/s² for gravitational acceleration, and meters for pressure head to get pressure in Pascals.
Q2: Why is gravitational acceleration typically 9.8 m/s²?
A: 9.8 m/s² is the standard acceleration due to gravity on Earth's surface. This value may vary slightly depending on location and altitude.
Q3: Can this formula be used for gases?
A: While the basic principle applies, gases are compressible and their density changes with pressure, making calculations more complex than for liquids.
Q4: What is pressure head exactly?
A: Pressure head represents the height of a liquid column that would produce the given pressure. It's a way to express pressure in terms of equivalent fluid height.
Q5: How does temperature affect the calculation?
A: Temperature affects fluid density. For accurate results, use density values appropriate for the fluid's temperature.