What is pound-force per square inch (psi)?

Pound-force per square inch (psi) is an imperial unit of pressure defined as one pound-force applied over an area of one square inch, commonly used in engineering and everyday contexts.

What does millimeter water (4°C) measure?

Millimeter water (4°C) measures very small pressures, specifically the hydrostatic pressure exerted by a 1 mm column of water at 4°C under standard gravity.

Why convert psi to millimeter water (4°C)?

Converting psi to millimeter water (4°C) helps translate higher pressure imperial units to precise hydrostatic pressure values useful for calibrating sensitive instruments and measuring small pressure differentials.

Convert Pound-force/square inch to Millimeter Water (4°C) Pressure Units

Easily convert pressure values from pound-force per square inch (psi) to millimeter water (4°C) and understand their respective uses in engineering and low-pressure measurements.

Pound-force/square inch

Millimeter water (4°C)

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

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

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.

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

Explore More Pressure Units Converter

What Is This Tool?

This unit converter transforms pressure measurements from pound-force per square inch (psi), an imperial unit commonly used in automotive and industrial settings, into millimeter water (4°C), a unit for very small pressures relevant to HVAC and laboratory applications.

How to Use This Tool?

Enter the pressure value in pound-force/square inch (psi)
Select pound-force/square inch as the input unit
Choose millimeter water (4°C) as the output unit
Click the convert button to view the pressure in millimeter water (4°C)
Use the results to aid in applications requiring precise low-pressure measurements

Key Features

Converts pressure values between pound-force/square inch and millimeter water (4°C)
Useful for engineering and scientific pressure measurement needs
Browser-based and straightforward interface for quick conversions
Supports pressure conversion required for sensitive low-pressure instruments
Highlights practical use cases across industries for both units

Examples

5 psi converts to approximately 3515.44 millimeter water (4°C)
0.1 psi converts to approximately 70.31 millimeter water (4°C)

Common Use Cases

Measuring and specifying automotive tire pressures and hydraulic system pressures
Calibrating low-range pressure sensors in laboratory environments
Determining HVAC static pressures and cleanroom differential pressures
Assessing pressure drops in plumbing or filter applications involving small pressures
Translating higher imperial pressures into hydrostatic equivalents for sensitive instrument calibration

Tips & Best Practices

Ensure input values correspond to moderate or higher pressures suitable for psi measurements
Use millimeter water (4°C) unit conversions for applications involving small pressure differentials
Consider the practical measurement range and required precision when interpreting results
Be aware of environmental factors like temperature and gravity that can influence millimeter water pressure readings
Cross-check results when using the conversion for critical calibration or scientific purposes

Limitations

Pound-force/square inch is designed for moderate to high pressures while millimeter water (4°C) measures very small pressures
Direct conversion must account for measurement range suitability to ensure meaningful readings
Millimeter water unit accuracy may be affected by temperature and gravity variations
Not all high-pressure values in psi translate effectively for use in low-pressure millimeter water contexts

Frequently Asked Questions

What is pound-force per square inch (psi)?: Pound-force per square inch (psi) is an imperial unit of pressure defined as one pound-force applied over an area of one square inch, commonly used in engineering and everyday contexts.
What does millimeter water (4°C) measure?: Millimeter water (4°C) measures very small pressures, specifically the hydrostatic pressure exerted by a 1 mm column of water at 4°C under standard gravity.
Why convert psi to millimeter water (4°C)?: Converting psi to millimeter water (4°C) helps translate higher pressure imperial units to precise hydrostatic pressure values useful for calibrating sensitive instruments and measuring small pressure differentials.

Key Terminology

Pound-force per square inch (psi): An imperial unit of pressure that equals one pound-force applied to an area of one square inch, used widely in engineering.
Millimeter water (4°C): The hydrostatic pressure exerted by a 1 mm column of pure water at 4 °C under standard gravity, representing very small pressures.
Hydrostatic Pressure: The pressure exerted by a fluid at equilibrium due to the force of gravity.

Quick Knowledge Check

What does one pound-force per square inch represent?

One pound-force on a square foot

One pound-force on one square inch

One kilogram-force on one square inch

Which unit is used for very small pressure measurements?

Pound-force per square inch

Millimeter water (4°C)

Pascal

In which field is millimeter water (4°C) commonly applied?

Measuring hydraulic system pressure

HVAC static pressure and cleanroom differential monitoring

Automotive tire pressure ratings

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