Why is millimeter mercury defined at 0°C?

Because the pressure it represents is based on a 1 mm column of mercury measured at 0°C under standard gravity.

What applications use centimeter water (4°C) as a pressure unit?

It is commonly used for expressing small pressures in medical respiratory care, laboratory measurements, and medical device settings.

Does temperature affect the conversion accuracy between these units?

Yes, since each unit is defined at specific temperatures, temperature variations can influence the accuracy of the conversion.

How to Convert from Millimeter mercury (0°C) to Centimeter water (4°C)?

Learn how to convert pressure values from millimeter mercury at 0°C to centimeter water at 4°C using this practical unit converter. Ideal for healthcare and laboratory applications.

Millimeter mercury (0°C)

Centimeter water (4°C)

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

Millimeter mercury (0°C) to Centimeter water (4°C) Conversion Table

Millimeter mercury (0°C)	Centimeter 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.

Millimeter mercury (0°C) to Centimeter water (4°C) Conversion Table
Millimeter mercury (0°C)	Centimeter water (4°C)

Explore More Pressure Units Converter

What Is This Tool?

This converter transforms pressure measurements between millimeter mercury (0°C) and centimeter water (4°C), enabling users to switch units used in clinical, laboratory, and engineering scenarios efficiently.

How to Use This Tool?

Enter the pressure value in millimeter mercury (0°C) units
Select the target unit as centimeter water (4°C)
Click the convert button to get the pressure in cm water (4°C)
Use the resulting value for your clinical, laboratory, or engineering needs

Key Features

Converts pressure units between mmHg (0°C) and cm water (4°C)
Supports common medical and laboratory pressure measurements
Browser-based and easy to use without installation
Provides clear conversion examples
Suitable for translating values in respiratory care devices and blood pressure monitoring

Examples

5 mmHg converts to approximately 6.7977 cm water (4°C)
10 mmHg converts to approximately 13.5954 cm water (4°C)

Common Use Cases

Converting blood pressure readings for clinical analysis
Reporting vapor or partial pressures in laboratory settings
Measuring airway and ventilator pressures in respiratory therapy
Calibrating medical devices like CPAP and chest drains
Assessing moderate vacuum or hydrostatic pressures in engineering

Tips & Best Practices

Always confirm pressure readings are at specified temperatures (0°C for mercury, 4°C for water)
Use the conversion for small pressure ranges common in medical and lab contexts
Be mindful of gravity variations or fluid impurities which might affect measurement accuracy
Cross-check converted values when precision is critical for device calibration

Limitations

Temperature dependency can affect conversion accuracy
Centimeter water is a non-SI unit, which may limit usage in strict SI environments
Conversion assumes standard gravity and pure fluid conditions
Variations in local gravity or contaminants in fluids can impact results

Frequently Asked Questions

Why is millimeter mercury defined at 0°C?: Because the pressure it represents is based on a 1 mm column of mercury measured at 0°C under standard gravity.
What applications use centimeter water (4°C) as a pressure unit?: It is commonly used for expressing small pressures in medical respiratory care, laboratory measurements, and medical device settings.
Does temperature affect the conversion accuracy between these units?: Yes, since each unit is defined at specific temperatures, temperature variations can influence the accuracy of the conversion.

Key Terminology

Millimeter mercury (0°C) [mmHg]: A pressure unit representing the force from a 1 mm column of mercury at 0°C under standard gravity.
Centimeter water (4°C): A unit of pressure equaling the hydrostatic pressure from a 1 cm column of pure water at 4°C.
Hydrostatic pressure: The pressure exerted by a fluid due to the force of gravity.

Quick Knowledge Check

What does 1 millimeter mercury (0°C) equal in centimeter water (4°C)?

About 0.98 cm water

About 1.36 cm water

About 1.00 cm water

Which unit is commonly used in respiratory care for small pressure measurements?

Millimeter mercury (0°C)

Centimeter water (4°C)

Pascal

What can affect the precision of this pressure conversion?

Temperature variations and fluid impurities

Color of the mercury

Altitude only

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