What does foot water (4°C) measure?

It measures the hydrostatic pressure from a one-foot column of pure water at 4°C, commonly used to express low pressures or hydraulic head.

Why is inch mercury measured at 60°F?

The 60°F reference temperature standardizes mercury’s density for consistent calibration of atmospheric, vacuum, and instrument pressures.

In which fields is this conversion useful?

It’s useful in fluid mechanics, hydrology, HVAC diagnostics, meteorology, aviation, and laboratory vacuum systems.

How to Convert from Foot water (4°C) [ftAq] to Inch mercury (60°F) [inHg]?

Learn how to convert pressure values from foot water (4°C) to inch mercury (60°F) using this practical online converter. Understand the key features, use cases, and steps for accurate pressure unit conversion.

Foot water (4°C) [ftAq]

Inch mercury (60°F) [inHg]

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

Foot water (4°C) [ftAq] to Inch mercury (60°F) [inHg] Conversion Table

Foot water (4°C) [ftAq]	Inch mercury (60°F) [inHg]

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.

Foot water (4°C) [ftAq] to Inch mercury (60°F) [inHg] Conversion Table
Foot water (4°C) [ftAq]	Inch mercury (60°F) [inHg]

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What Is This Tool?

This tool allows you to convert pressure measurements from foot water (4°C), which represents hydrostatic pressure from a column of water at 4°C, into inch mercury (60°F), a pressure unit based on mercury's density at 60°F. It is helpful for integrating measurements between water-based pressures and mercury-based instruments.

How to Use This Tool?

Enter the pressure value you want to convert in foot water (4°C)
Select foot water (4°C) as the input unit and inch mercury (60°F) as the output
Click the convert button to see the equivalent pressure in inch mercury (60°F)
Use the converted value for applications like HVAC diagnostics or aviation pressure settings

Key Features

Simple conversion between foot water (4°C) and inch mercury (60°F) units
Useful for pressures related to hydraulic head and atmospheric or vacuum systems
Browser-based and easy to use without requiring additional software
Covers scientific, meteorological, and industrial pressure applications

Examples

5 foot water (4°C) equals 4.4257 inch mercury (60°F)
10 foot water (4°C) equals 8.8514 inch mercury (60°F)

Common Use Cases

Specifying hydraulic head and low pressures in pump and water distribution systems
Interpreting manometer or gauge readings in laboratory, HVAC, and fluid instrumentation
Expressing static head or depth-pressure relationships in groundwater and well measurements
Reporting sea-level atmospheric pressure in meteorology
Setting altimeters and pressure references in U.S. aviation
Indicating vacuum levels in laboratory and vacuum system gauges

Tips & Best Practices

Ensure correct temperature references when converting between units to avoid errors
Use this converter for hydrostatic pressures rather than dynamic or non-hydrostatic cases
Handle units carefully when mixing mercury and water pressure measurements
Apply results in contexts like fluid mechanics, HVAC, meteorology, aviation, and instrumentation calibration for best accuracy

Limitations

Conversion relies on different temperature reference points for water (4°C) and mercury (60°F)
Precision may not extend to dynamic or non-hydrostatic pressure scenarios
Densities of mercury and water differ greatly, so careful attention to units is necessary
This conversion is best suited for hydrostatic pressure measurements

Frequently Asked Questions

What does foot water (4°C) measure?: It measures the hydrostatic pressure from a one-foot column of pure water at 4°C, commonly used to express low pressures or hydraulic head.
Why is inch mercury measured at 60°F?: The 60°F reference temperature standardizes mercury’s density for consistent calibration of atmospheric, vacuum, and instrument pressures.
In which fields is this conversion useful?: It’s useful in fluid mechanics, hydrology, HVAC diagnostics, meteorology, aviation, and laboratory vacuum systems.

Key Terminology

Foot water (4°C) [ftAq]: A pressure unit equal to the hydrostatic pressure from a 1-foot column of water at 4°C, used for low pressures and hydraulic head.
Inch mercury (60°F) [inHg]: A pressure unit based on the pressure from a one-inch column of mercury at 60°F, used in meteorology, aviation, and vacuum systems.
Hydrostatic pressure: Pressure exerted by a fluid at equilibrium due to gravity.

Quick Knowledge Check

What does 1 foot water (4°C) represent?

A pressure from a 1-foot mercury column at 60°F

A hydrostatic pressure from a 1-foot column of water at 4°C

Atmospheric pressure at sea level

Why is the reference temperature different for inch mercury compared to foot water?

Because mercury densities vary with temperature and 60°F standardizes it

The temperatures represent the boiling points of water and mercury

It is arbitrary and has no impact on pressure values

Which is a common use for inch mercury (60°F)?

Expressing hydraulic head in water systems

Setting altimeters in U.S. aviation

Measuring electrical resistance

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