What does millimeter water (4°C) measure?

It measures the hydrostatic pressure from a 1 mm column of pure water at 4 °C under standard gravity, representing very small pressures.

Where is pound-force per square inch commonly used?

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

Can this tool be used for high-pressure conversions?

This tool is intended for converting very small pressures measured in millimeter water (4°C) to psi and is generally used for low-pressure contexts.

How to Convert from Millimeter Water (4°C) to Pound-force/square Inch

Convert pressure values from millimeter water (4°C), a small pressure unit, to the widely used imperial unit pound-force per square inch (psi) with ease using this online converter tool.

Millimeter water (4°C)

Pound-force/square inch

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

Millimeter water (4°C) to Pound-force/square inch Conversion Table

Millimeter water (4°C)	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.

Millimeter water (4°C) to Pound-force/square inch Conversion Table
Millimeter water (4°C)	Pound-force/square inch

Explore More Pressure Units Converter

What Is This Tool?

This online converter transforms pressure measurements from millimeter water (4°C), which represents very small pressures, into pound-force per square inch (psi), a common imperial pressure unit used in various practical applications.

How to Use This Tool?

Enter the pressure value measured in millimeter water (4°C).
Select the input unit as millimeter water (4°C) and the output unit as pound-force/square inch.
Click the convert button to view the pressure value in psi.

Key Features

Converts small pressure values from millimeter water (4°C) to pound-force per square inch (psi)
User-friendly, browser-based interface for quick and accurate pressure conversions
Supports contexts such as HVAC monitoring, sensor calibration, and automotive applications

Examples

10 millimeter water (4°C) converts to approximately 0.0142 pound-force/square inch.
100 millimeter water (4°C) converts to approximately 0.1422 pound-force/square inch.

Common Use Cases

Measuring low-pressure values in HVAC systems and cleanrooms.
Calibrating and specifying low-range pressure sensors and laboratory equipment.
Evaluating pressure drops in filters and small plumbing or drainage systems.
Assessing automotive tire pressures and hydraulic system diagnostics.
Reading pressures in compressed-gas cylinders and air compressors.

Tips & Best Practices

Ensure environmental conditions such as temperature and gravity correspond to standard values when using millimeter water (4°C).
Use precise input values to maintain accuracy in conversions due to the small magnitude of millimeter water (4°C) pressures.
Familiarize yourself with the context of pressure measurements to select appropriate units for your application.

Limitations

The very small size of millimeter water (4°C) pressures requires precision for reliable conversions.
Environmental factors like temperature and gravity must be consistent with standard conditions for millimeter water (4°C).
This tool does not account for variations outside standard temperature or gravity.

Frequently Asked Questions

What does millimeter water (4°C) measure?: It measures the hydrostatic pressure from a 1 mm column of pure water at 4 °C under standard gravity, representing very small pressures.
Where is pound-force per square inch commonly used?: Pound-force per square inch is widely used in automotive tire pressure ratings, hydraulic and pneumatic system specifications, and compressed-gas cylinder readings.
Can this tool be used for high-pressure conversions?: This tool is intended for converting very small pressures measured in millimeter water (4°C) to psi and is generally used for low-pressure contexts.

Key Terminology

Millimeter water (4°C): A unit of very small pressure representing the hydrostatic pressure from a 1 mm column of pure water at 4 °C under standard gravity.
Pound-force per square inch (psi): An imperial pressure unit defined as one pound-force applied over one square inch of area.
Hydrostatic Pressure: The pressure exerted by a fluid due to the force of gravity acting on it.

Quick Knowledge Check

What pressure does one millimeter water (4°C) represent?

Pressure from a 1-meter water column

Pressure from a 1 millimeter column of pure water at 4 °C

Pressure from a 1 millimeter mercury column

Which unit is defined by one pound-force over one square inch?

Millimeter water (4°C)

Pound-force per square inch (psi)

Pascal

In which applications is millimeter water (4°C) commonly used?

Low-pressure measurements in HVAC and sensor calibration

High-pressure hydraulic systems

Measuring atmospheric pressure

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