What does inch water (4°C) measure?

It measures the hydrostatic pressure produced by a one-inch column of pure water at 4 °C under standard gravity, used primarily for low-pressure readings.

Where is pound-force per square inch commonly used?

Pound-force per square inch is widely used in automotive tire pressure, hydraulic and pneumatic system specifications, and compressed gas cylinder pressures.

Why convert from inch water (4°C) to psi?

It translates low-pressure measurements to a standard imperial unit commonly used in engineering and industrial applications.

Convert Inch Water (4°C) [inAq] to Pound-force/square inch Pressure

Use our tool to convert pressure values from inch water (4°C), a unit for low-pressure measurements, to pound-force per square inch (psi), commonly used in engineering and everyday applications.

Inch water (4°C) [inAq]

Pound-force/square inch

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

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

Inch water (4°C) [inAq]	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.

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

Explore More Pressure Units Converter

What Is This Tool?

This converter allows you to translate pressure values measured in inch water (4°C) to pound-force per square inch (psi). Inch water at 4 °C is a small pressure unit used for precise low-pressure measurement, while psi is a widely recognized imperial pressure unit used in various engineering fields.

How to Use This Tool?

Enter the pressure value measured in inch water (4°C)
Select inch water (4°C) as the input unit
Choose pound-force per square inch as the output unit
Click convert to see the equivalent pressure in psi

Key Features

Converts inch water (4°C) pressure values to pound-force per square inch units
Browser-based and easy to use with no installation required
Supports precise low-pressure to standard engineering pressure unit conversions

Examples

Convert 10 inch water (4°C) to psi: 10 × 0.0361262898 = 0.361262898 psi
Convert 50 inch water (4°C) to psi: 50 × 0.0361262898 = 1.80631449 psi

Common Use Cases

Measuring static and differential pressures in HVAC ducting and ventilation
Checking pressure drops across filters, strainers, and clean-room equipment
Testing low-pressure gas lines and burner manifolds
Retrieving pressure specifications for hydraulic and pneumatic systems
Automotive tire pressure readings and compressed gas cylinder pressure monitoring

Tips & Best Practices

Ensure measurements use pure water at 4 °C under standard gravity when using inch water units
Use inch water (4°C) for detecting very low-pressure differences requiring fine resolution
Use psi units for standard engineering and industrial pressure documentation
Always verify you select the correct input and output units to avoid conversion errors

Limitations

Inch water (4°C) measurements depend on water temperature and standard gravity conditions
Variations in fluid type or local gravity may impact the accuracy of inch water pressure readings
Pound-force per square inch is less suitable for very low-pressure measurements due to lower resolution compared to inch water

Frequently Asked Questions

What does inch water (4°C) measure?: It measures the hydrostatic pressure produced by a one-inch column of pure water at 4 °C under standard gravity, used primarily for low-pressure readings.
Where is pound-force per square inch commonly used?: Pound-force per square inch is widely used in automotive tire pressure, hydraulic and pneumatic system specifications, and compressed gas cylinder pressures.
Why convert from inch water (4°C) to psi?: It translates low-pressure measurements to a standard imperial unit commonly used in engineering and industrial applications.

Key Terminology

Inch water (4°C) [inAq]: A pressure unit equal to the hydrostatic pressure from a 1-inch column of pure water at 4 °C under standard gravity.
Pound-force per square inch (psi): An imperial unit measuring pressure as one pound-force applied over an area of one square inch.

Quick Knowledge Check

What does inch water (4°C) represent?

Pressure of a 1-inch column of mercury at 4 °C

Pressure of a 1-inch column of pure water at 4 °C

Pressure of a 1-inch column of air at 4 °C

Pound-force per square inch is best described as:

One pound-force on a one square meter area

One pound-force on a one square inch area

One kilogram-force on a one square inch area

A common use for inch water (4°C) pressure is:

Measuring automotive tire pressure

Monitoring low differential pressure in HVAC systems

Setting compressed gas cylinder pressures

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