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

It represents the hydrostatic pressure from a 1-foot column of pure water at 4°C, commonly used to express low pressures or hydraulic head.

Why is 4°C used as the reference temperature?

Because 4°C is the temperature at which water reaches its maximum density, making it ideal for consistent hydrostatic pressure calculations.

Can this conversion be used for fluids other than water?

No, this conversion is specific to hydrostatic pressures of water at 4°C and assumes standard gravity.

Where is millimeter water (4°C) typically used?

It is used for measuring very small pressures, such as in HVAC static pressure measurements or calibration of low-range pressure sensors.

Does temperature variation affect the conversion accuracy?

Yes, deviations from 4°C water temperature and standard gravity can influence the accuracy of conversions.

How to Convert from Foot water (4°C) [ftAq] to Millimeter water (4°C)?

Learn how to convert pressure measurements from foot water (4°C) to millimeter water (4°C) using this online unit converter designed for precise low pressure and hydraulic head calculations.

Foot water (4°C) [ftAq]

Millimeter water (4°C)

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

Foot water (4°C) [ftAq] to Millimeter water (4°C) Conversion Table

Foot water (4°C) [ftAq]	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.

Foot water (4°C) [ftAq] to Millimeter water (4°C) Conversion Table
Foot water (4°C) [ftAq]	Millimeter water (4°C)

Explore More Pressure Units Converter

What Is This Tool?

This tool converts pressure values from foot water (4°C), a unit representing hydrostatic pressure from a 1-foot column of water at 4°C, to millimeter water (4°C), a pressure unit based on a 1 mm column of water at the same temperature. It is ideal for expressing low hydrostatic pressures and head in more precise units.

How to Use This Tool?

Enter the pressure value in foot water (4°C)
Select the target unit as millimeter water (4°C)
Click the convert button to get the equivalent pressure in millimeter water (4°C)
Use the results for calibration, system design, or diagnostics as needed

Key Features

Converts pressure from foot water (4°C) to millimeter water (4°C)
Based on the hydrostatic pressure of pure water at 4°C under standard gravity
Suitable for low-pressure and hydraulic head measurements
Supports precise adjustments for pressure sensor calibration and laboratory uses
Easy-to-use, browser-based conversion tool

Examples

Convert 1 foot water (4°C) to millimeter water (4°C) to get approximately 304.8 mm water (4°C)
Convert 2 foot water (4°C) to get about 609.6 mm water (4°C)
Use the tool to translate hydraulic head measurements for pump system design

Common Use Cases

Specifying hydraulic head and low pressures in pumps and water-distribution systems
Interpreting manometer or gauge readings in HVAC and fluid instrumentation
Expressing static head or pressure–depth relations in groundwater studies
Calibrating low-range pressure sensors in laboratories
Measuring small pressure drops in plumbing, drainage, or filter systems

Tips & Best Practices

Ensure water temperature is at or near 4°C for accurate conversion
Use the tool for low pressure ranges relevant to hydraulic head calculations
Verify instrument calibration matches the unit definitions provided
Consider environmental factors such as gravity variations which may affect results
Employ the converter when precise hydrostatic pressure measurements are required

Limitations

Conversion accuracy depends on the water density at exactly 4°C
Standard gravity assumptions may not hold in all conditions
Primarily applicable for low pressure and hydrostatic head scenarios involving water
Not suitable for pressures involving other fluids or varying temperatures
Precision may vary if ambient conditions deviate from the reference state

Frequently Asked Questions

What does one foot water (4°C) represent?: It represents the hydrostatic pressure from a 1-foot column of pure water at 4°C, commonly used to express low pressures or hydraulic head.
Why is 4°C used as the reference temperature?: Because 4°C is the temperature at which water reaches its maximum density, making it ideal for consistent hydrostatic pressure calculations.
Can this conversion be used for fluids other than water?: No, this conversion is specific to hydrostatic pressures of water at 4°C and assumes standard gravity.
Where is millimeter water (4°C) typically used?: It is used for measuring very small pressures, such as in HVAC static pressure measurements or calibration of low-range pressure sensors.
Does temperature variation affect the conversion accuracy?: Yes, deviations from 4°C water temperature and standard gravity can influence the accuracy of conversions.

Key Terminology

Foot water (4°C) [ftAq]: A pressure unit equal to the hydrostatic pressure exerted by a 1-foot column of pure water at 4°C, used for expressing low pressures or hydraulic head.
Millimeter water (4°C): A pressure unit based on the hydrostatic pressure exerted by a 1 mm column of pure water at 4°C, ideal for very small pressure measurements.
Hydrostatic pressure: The pressure exerted by a fluid at rest due to the force of gravity acting on its column height.

Quick Knowledge Check

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

Pressure from 1 meter of water at 20°C

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

Atmospheric pressure at sea level

What is the approximate equivalent of 1 foot water (4°C) in millimeter water (4°C)?

100 mm water (4°C)

305 mm water (4°C)

10 mm water (4°C)

Which factor can impact the accuracy of this conversion?

Water temperature deviation from 4°C

Color of the water

Sunlight exposure

Share Us

Similar Calculators

Online Thermal Resistance Units Converter Online Surface Current Density Units Converter Online Volume Units Converter Online Volume Dry Units Converter Online Weight and Mass Units Converter