Why is the temperature 4 °C important for these units?

Both millimeter water (4°C) and inch water (4°C) define pressure based on water at 4 °C, which is the temperature of maximum water density affecting the hydrostatic pressure.

Can I use this converter for pressures measured at different temperatures?

Accuracy may decrease if measurements deviate from 4 °C since the units depend on water density at that temperature.

What are typical applications for converting these pressure units?

Common uses include HVAC system diagnostics, laboratory experiments, and cleanroom pressure monitoring where fine low-pressure resolution is required.

How to Convert from Millimeter water (4°C) to Inch water (4°C) [inAq]

Convert pressure values from millimeter water (4°C) to inch water (4°C) [inAq] using this simple online unit converter designed for precise low-pressure measurements.

Millimeter water (4°C)

Inch water (4°C) [inAq]

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

Millimeter water (4°C) to Inch water (4°C) [inAq] Conversion Table

Millimeter water (4°C)	Inch water (4°C) [inAq]

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 Inch water (4°C) [inAq] Conversion Table
Millimeter water (4°C)	Inch water (4°C) [inAq]

Explore More Pressure Units Converter

What Is This Tool?

This tool converts pressure values between millimeter water (4°C) and inch water (4°C) [inAq], units commonly used to measure very low hydrostatic pressures under standard gravity at 4 °C. It is ideal for applications needing fine pressure resolution.

How to Use This Tool?

Enter the pressure value in millimeter water (4°C).
Select the input unit as millimeter water (4°C) and output unit as inch water (4°C) [inAq].
Click the convert button to get the pressure value in inch water (4°C) [inAq].

Key Features

Converts pressure from millimeter water (4°C) to inch water (4°C) [inAq] accurately using the defined conversion rate.
Browser-based and easy to use without installation.
Supports unit conversions used in HVAC, laboratory, and cleanroom pressure measurements.

Examples

Convert 10 millimeter water (4°C) to inch water (4°C): 10 × 0.039370087 = 0.39370087 inch water (4°C) [inAq]
Convert 50 millimeter water (4°C) to inch water (4°C): 50 × 0.039370087 = 1.96850435 inch water (4°C) [inAq]

Common Use Cases

HVAC static and differential pressure monitoring in ductwork and ventilation.
Calibrating and specifying low-range pressure sensors in laboratories.
Measuring pressure drops across filters and cleanroom equipment.

Tips & Best Practices

Always ensure measurements are taken at or near 4 °C to maintain unit accuracy.
Use sensitive instrumentation suited for very low pressure ranges.
Confirm fluid purity and standard gravity conditions for precise conversions.

Limitations

Units are valid only for hydrostatic pressures at 4 °C and standard gravity conditions.
Deviation in temperature, gravity, or fluid purity affects conversion correctness.
Conversion precision reduces if applied outside specified conditions.

Frequently Asked Questions

Why is the temperature 4 °C important for these units?: Both millimeter water (4°C) and inch water (4°C) define pressure based on water at 4 °C, which is the temperature of maximum water density affecting the hydrostatic pressure.
Can I use this converter for pressures measured at different temperatures?: Accuracy may decrease if measurements deviate from 4 °C since the units depend on water density at that temperature.
What are typical applications for converting these pressure units?: Common uses include HVAC system diagnostics, laboratory experiments, and cleanroom pressure monitoring where fine low-pressure resolution is required.

Key Terminology

Millimeter water (4°C): The hydrostatic pressure exerted by a 1 mm column of pure water at 4 °C under standard gravity.
Inch water (4°C) [inAq]: Hydrostatic pressure caused by a 1 inch column of pure water at 4 °C under standard gravity; a small pressure unit equal to about 249 pascals.
Hydrostatic Pressure: Pressure exerted by a fluid at rest due to the force of gravity.

Quick Knowledge Check

What does a millimeter water (4°C) measure?

Pressure exerted by a one-inch water column

Hydrostatic pressure by a 1 mm column of water at 4°C

Temperature of maximum water density

What is the approximate conversion factor from millimeter water (4°C) to inch water (4°C)?

0.254 inch water (4°C)

0.039370087 inch water (4°C)

9.8066 inch water (4°C)

In which field is this pressure conversion commonly used?

HVAC and laboratory low-pressure measurements

High-pressure industrial hydraulics

Meteorological wind speed measurement

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