What does one foot water (4°C) represent in pressure terms?

One foot water (4°C) is the pressure exerted by a one-foot column of pure water at 4 degrees Celsius, used for expressing low hydraulic pressures.

Where is pound-force per square inch commonly used?

Pound-force per square inch (psi) is used widely in automotive tire pressure, hydraulic and pneumatic systems, and compressed gas equipment.

Can I use this converter for high-pressure systems?

No, because foot water (4°C) is a low-pressure unit, it is not practical for high-pressure measurements.

How to Convert from Foot water (4°C) [ftAq] to Pound-force/square inch

Learn how to convert pressure values from foot water (4°C), a unit representing low hydraulic pressures, into pound-force per square inch (psi), widely used in engineering and industrial applications.

Foot water (4°C) [ftAq]

Pound-force/square inch

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

Foot water (4°C) [ftAq] to Pound-force/square inch Conversion Table

Foot water (4°C) [ftAq]	Pound-force/square inch

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.

Foot water (4°C) [ftAq] to Pound-force/square inch Conversion Table
Foot water (4°C) [ftAq]	Pound-force/square inch

Explore More Pressure Units Converter

What Is This Tool?

This converter allows you to easily change pressure measurements from foot water (4°C), a unit based on the hydrostatic pressure of water at 4 degrees Celsius, into pound-force per square inch, a common imperial pressure unit used in many industries.

How to Use This Tool?

Enter the pressure value measured in foot water (4°C)
Select the unit foot water (4°C) as the starting measurement
Choose pound-force per square inch as the target unit
Submit the values to immediately receive the converted pressure in psi
Use the provided results to aid in system calibrations or reporting

Key Features

Converts pressure units from foot water (4°C) to pound-force per square inch (psi)
Uses an exact conversion rate for accurate transformation between units
Supports understanding low pressures and hydraulic head values
Suitable for applications in water systems, HVAC, and fluid instrumentation
Browser-based and easy to use without requiring installation

Examples

Convert 5 foot water (4°C): 5 ftAq equals approximately 2.17 psi
Convert 10 foot water (4°C): 10 ftAq equals approximately 4.34 psi

Common Use Cases

Specifying hydraulic head and low pressure for pumps and water-distribution networks
Interpreting readings from manometers or gauges in laboratories or HVAC systems
Expressing static head or pressure related to groundwater and well measurements
Standardizing low-pressure readings to psi for engineering and industrial documentation
Calibrating automotive tire pressures and pneumatic systems

Tips & Best Practices

Confirm the water temperature reference is 4°C to ensure correct conversion
Use this unit primarily for low-pressure measurements due to its low magnitude
Rely on the exact conversion formula without approximations for best accuracy
Employ the converted psi values for system design and calibration consistency
Remember the conversion depends on assumptions about water density and gravity

Limitations

Foot water unit is temperature-specific and assumes water density at 4°C
Not suited for high-pressure measurements because of its low value scale
Conversion accuracy relies on physical constants like water density and gravitation
Only applicable for pressures related to hydraulic head or similar low-pressure contexts

Frequently Asked Questions

What does one foot water (4°C) represent in pressure terms?: One foot water (4°C) is the pressure exerted by a one-foot column of pure water at 4 degrees Celsius, used for expressing low hydraulic pressures.
Where is pound-force per square inch commonly used?: Pound-force per square inch (psi) is used widely in automotive tire pressure, hydraulic and pneumatic systems, and compressed gas equipment.
Can I use this converter for high-pressure systems?: No, because foot water (4°C) is a low-pressure unit, it is not practical for high-pressure measurements.

Key Terminology

Foot water (4°C) [ftAq]: A pressure unit representing hydrostatic pressure from a 1-foot column of water at 4 degrees Celsius.
Pound-force per square inch (psi): An imperial pressure unit defined as force of one pound applied over one square inch.
Hydraulic head: A measure of potential energy related to fluid pressure, commonly indicated in feet of water.

Quick Knowledge Check

What temperature condition is foot water (ftAq) based on?

0°C

4°C

20°C

What type of pressure is foot water primarily used to express?

High pressure

Low pressure or hydraulic head

Atmospheric pressure

What is one pound-force per square inch equal to?

One pound-force applied on one square inch

One pascal

One kilogram per square meter

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