What does inch water (4°C) measure?

It measures hydrostatic pressure produced by a 1-inch column of pure water at 4 °C under standard gravity, used mainly for low-pressure measurements.

Why convert inch water to poundal per square foot?

To translate pressure data from the metric-based hydrostatic standard into the FPS system used in some engineering and legacy contexts.

Is poundal per square foot still widely used?

It is less common today but remains relevant in legacy engineering calculations, historical data analysis, and educational scenarios.

How to Convert from Inch Water (4°C) [inAq] to Poundal/Square Foot

Learn how to convert pressure values from inch water at 4°C (inAq) to poundal per square foot using this easy and accurate online converter tool. Understand the units, conversion formula, and practical applications in engineering and HVAC.

Inch water (4°C) [inAq]

Poundal/square foot

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

Inch water (4°C) [inAq] to Poundal/square foot Conversion Table

Inch water (4°C) [inAq]	Poundal/square foot

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.

Inch water (4°C) [inAq] to Poundal/square foot Conversion Table
Inch water (4°C) [inAq]	Poundal/square foot

Explore More Pressure Units Converter

What Is This Tool?

This unit converter transforms pressure measurements from inch water at 4°C (inAq), a metric-based hydrostatic pressure unit, into poundal per square foot, a pressure unit commonly used in the FPS system. It helps bridge measurements between modern metric standards and legacy engineering units.

How to Use This Tool?

Enter the pressure value in inch water (4°C) [inAq]
Select poundal per square foot as the target unit
Click convert to see the equivalent pressure in poundal/square foot
Review results for use in your engineering or laboratory calculations

Key Features

Converts inch water (4°C) pressure values to poundal per square foot units accurately
Supports low-pressure measurements for HVAC, laboratory, and engineering applications
Browser-based interface for quick and convenient unit translation
Includes practical examples for easy comprehension
Useful for legacy FPS system conversion and historical data analysis

Examples

2 Inch water (4°C) [inAq] equals 334.7507525314 Poundal/square foot
0.5 Inch water (4°C) [inAq] equals 83.68768813285 Poundal/square foot

Common Use Cases

Measuring static and differential pressures in HVAC ducting and ventilation systems
Monitoring pressure drops across filters and clean-room equipment
Testing low-pressure gas lines and burner manifolds
Converting legacy engineering data from poundal/square foot to modern units
Solving classroom problems involving FPS units like poundals and square feet

Tips & Best Practices

Ensure water temperature is at 4 °C for accurate inch water pressure readings
Double-check the units when working with legacy FPS pressure data
Use this converter for low-pressure applications where fine resolution matters
Cross-reference converted values when analyzing historical data
Apply consistent units throughout your engineering calculations for clarity

Limitations

The inch water unit accuracy relies on standard conditions like water at 4 °C and gravity
Poundal per square foot is less common today and may cause confusion
Verify units carefully when working with modern data sets and older references

Frequently Asked Questions

What does inch water (4°C) measure?: It measures hydrostatic pressure produced by a 1-inch column of pure water at 4 °C under standard gravity, used mainly for low-pressure measurements.
Why convert inch water to poundal per square foot?: To translate pressure data from the metric-based hydrostatic standard into the FPS system used in some engineering and legacy contexts.
Is poundal per square foot still widely used?: It is less common today but remains relevant in legacy engineering calculations, historical data analysis, and educational scenarios.

Key Terminology

Inch water (4°C) [inAq]: A pressure unit defined by the hydrostatic pressure from a 1-inch column of water at 4°C under standard gravity, used for fine low-pressure measurements.
Poundal/square foot: A FPS system pressure unit representing one poundal of force applied evenly on one square foot of area.
Hydrostatic pressure: The pressure exerted by a fluid at equilibrium due to the force of gravity.

Quick Knowledge Check

What physical quantity does inch water (4°C) represent?

A unit of length

A hydrostatic pressure unit

A temperature measurement

Which system uses poundal per square foot as a pressure unit?

Metric system

Foot–pound–second (FPS) system

Celsius system

In what kind of applications is inch water (4°C) commonly used?

High-pressure industrial hydraulics

Low-pressure HVAC and laboratory measurements

Electrical resistance testing

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