Home
Back
PSI Calculation Formula:
| From: | To: |
PSI (Pounds per Square Inch) calculation from head pressure is a fundamental concept in fluid mechanics and pump engineering. It converts the vertical height of water column (head) into pressure units for practical applications.
The calculator uses the PSI calculation formula:
Where:
Explanation: The formula converts the static pressure exerted by a column of water into pounds per square inch, accounting for water's specific gravity and gravitational acceleration.
Details: Accurate PSI calculation is essential for pump selection, system design, pressure testing, and ensuring proper operation of hydraulic systems in various applications including water supply, irrigation, and industrial processes.
Tips: Enter the head measurement in feet. The head represents the vertical height of the water column from the pump discharge to the highest point in the system. All values must be valid (head > 0).
Q1: Why is the conversion factor 0.433?
A: This factor accounts for water's density (62.4 lb/ft³) and gravitational acceleration, converting feet of head to pounds per square inch.
Q2: Does this work for fluids other than water?
A: No, this specific factor is for water. Other fluids require different conversion factors based on their specific gravity.
Q3: What is considered normal PSI for residential water systems?
A: Typical residential water pressure ranges from 40-80 PSI, with 50-60 PSI being optimal for most applications.
Q4: How does elevation affect PSI calculations?
A: Atmospheric pressure decreases with elevation, but the head-to-PSI conversion remains consistent as it's based on fluid column height.
Q5: When should I use this calculation?
A: Use for static pressure calculations in pump sizing, tank selection, sprinkler system design, and any application involving water column pressure.