What does psi measure?

Psi measures pressure as pounds of force applied per square inch of area, commonly used in Imperial and US customary systems.

Why use foot water (4°C) as a pressure unit?

Foot water (4°C) expresses low pressures as the hydrostatic pressure exerted by a 1-foot column of water at 4°C, useful in hydraulics and fluid studies.

Is the conversion affected by water temperature?

Yes, the conversion accuracy depends on the density of water at 4°C; changes in water temperature can alter hydrostatic pressure values.

How to Convert from Psi [psi] to Foot water (4°C) [ftAq]

Easily convert pressure values from psi (pound per square inch) to foot water (4°C) with this online unit converter. Useful for hydraulic and water-related applications.

Psi [psi]

Foot water (4°C) [ftAq]

Please check your input. It must be a valid numeric value.

Psi [psi] to Foot water (4°C) [ftAq] Conversion Table

Psi [psi]	Foot water (4°C) [ftAq]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Psi [psi] to Foot water (4°C) [ftAq] Conversion Table
Psi [psi]	Foot water (4°C) [ftAq]

Explore More Pressure Units Converter

What Is This Tool?

This converter transforms pressure values measured in psi, a common unit for force per area in Imperial and US customary systems, into foot water (4°C), a unit expressing hydrostatic pressure based on water column height at 4°C.

How to Use This Tool?

Enter the pressure value in psi into the input field
Select psi as the input unit and foot water (4°C) as the output unit
Click the convert button to get the equivalent pressure in foot water (4°C)
Use the results for applications involving hydraulic head or pressure-depth relationships

Key Features

Converts pressure from psi to foot water (4°C) quickly and accurately
Browser-based and easy to use with no installation needed
Supports applications in hydraulics, water management, HVAC, and fluid mechanics
Provides clear, practical interpretations of pressure as water column height

Examples

1 psi converts to approximately 2.3067 foot water (4°C)
10 psi converts to approximately 23.0673 foot water (4°C)

Common Use Cases

Interpreting tire and hydraulic system pressure readings in terms of water column height
Calculating pump heads and water distribution pressures in feet of water
Converting manometer or gauge readings to hydrostatic head in laboratory and HVAC setups
Determining static water pressure in groundwater and well investigations

Tips & Best Practices

Ensure water temperature is around 4°C for accurate hydrostatic pressure equivalence
Be mindful that foot water (4°C) suits low-pressure and hydraulic head values
Use this conversion to facilitate understanding of pressure in fluid systems relative to water height
Consider the practical limits when converting very high psi values due to large resulting numbers

Limitations

Accuracy depends on water density at 4°C; temperature variations affect results
Foot water (4°C) is a low-pressure unit and may produce large numbers with high psi values
Conversion precision is tied to the standardized reference conditions and may not apply universally

Frequently Asked Questions

What does psi measure?: Psi measures pressure as pounds of force applied per square inch of area, commonly used in Imperial and US customary systems.
Why use foot water (4°C) as a pressure unit?: Foot water (4°C) expresses low pressures as the hydrostatic pressure exerted by a 1-foot column of water at 4°C, useful in hydraulics and fluid studies.
Is the conversion affected by water temperature?: Yes, the conversion accuracy depends on the density of water at 4°C; changes in water temperature can alter hydrostatic pressure values.

Key Terminology

Psi [psi]: A pressure unit indicating pound-force applied to one square inch of area in Imperial and US customary systems.
Foot water (4°C) [ftAq]: A pressure unit equal to the hydrostatic pressure from a 1-foot column of water at 4°C, used to express low pressures and hydraulic head.
Hydrostatic pressure: Pressure exerted by a fluid at equilibrium due to the force of gravity, often expressed as height of a fluid column.

Quick Knowledge Check

What does psi stand for?

Pounds per square inch

Pound-force per square inch

Pressure per square inch

Why is foot water (4°C) used as a pressure unit?

Represents pressure exerted by mercury column

Represents hydrostatic pressure of a water column at 4°C

Represents air pressure at sea level

What is a common application of converting psi to foot water (4°C)?

Calculating battery voltage

Interpreting hydraulic head in water systems

Measuring temperature changes

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