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

It is the pressure exerted by a 1 mm column of pure water at 4°C under standard gravity, commonly used for very small pressure measurements.

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

Because hectopascal is widely used in meteorology and atmospheric sciences, converting helps interpret low-pressure data in these standardized units.

Are there any conditions affecting the conversion accuracy?

Yes, the conversion assumes pure water at 4°C and standard gravity; variations in fluid temperature or properties may affect accuracy.

How to Convert from Millimeter water (4°C) to Hectopascal [hPa]?

Easily convert pressure values from millimeter water (4°C) to hectopascal (hPa) using this straightforward unit converter. Understand the uses, process, and examples of this important pressure unit conversion.

Millimeter water (4°C)

Hectopascal [hPa]

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

Millimeter water (4°C) to Hectopascal [hPa] Conversion Table

Millimeter water (4°C)	Hectopascal [hPa]

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 Hectopascal [hPa] Conversion Table
Millimeter water (4°C)	Hectopascal [hPa]

Explore More Pressure Units Converter

What Is This Tool?

This converter changes pressure measurements from millimeter water (4°C), which reflects the pressure from a 1 mm column of pure water at 4°C, to hectopascal (hPa), a common unit in meteorology and atmospheric sciences.

How to Use This Tool?

Enter the pressure value in millimeter water (4°C)
Select millimeter water (4°C) as the source unit
Choose hectopascal [hPa] as the target unit
Click convert to get the equivalent pressure in hPa

Key Features

Converts small hydrostatic pressures to meteorologically relevant units
Uses precise definition based on water density at 4°C and standard gravity
Supports applications in HVAC, cleanroom pressure monitoring, and laboratory experiments
Browser-based and easy to use for quick pressure unit conversions

Examples

10 millimeter water (4°C) = 0.980638 hectopascal [hPa]
50 millimeter water (4°C) = 4.90319 hectopascal [hPa]

Common Use Cases

Measuring low pressures with manometers in HVAC systems
Calibrating low-range pressure sensors in laboratories
Expressing pressure drops across filters or small plumbing setups
Relating low pressure values to atmospheric pressure units for scientific communication
Using pressure data for aviation altimeter settings and weather forecasts

Tips & Best Practices

Ensure input values are accurate for small pressure measurements
Be mindful of environmental conditions, as fluid temperature or gravity changes may affect accuracy
Use this conversion to communicate low pressure data in familiar meteorological units
Handle resulting decimal values with attention to precision requirements

Limitations

Millimeter water (4°C) corresponds to very low pressures leading to small decimal outputs in hPa
Conversion accuracy depends on assuming standard gravity and pure water at exactly 4°C
Temperature or fluid property variations can introduce discrepancies in results

Frequently Asked Questions

What does one millimeter water (4°C) represent?: It is the pressure exerted by a 1 mm column of pure water at 4°C under standard gravity, commonly used for very small pressure measurements.
Why convert millimeter water (4°C) to hectopascal?: Because hectopascal is widely used in meteorology and atmospheric sciences, converting helps interpret low-pressure data in these standardized units.
Are there any conditions affecting the conversion accuracy?: Yes, the conversion assumes pure water at 4°C and standard gravity; variations in fluid temperature or properties may affect accuracy.

Key Terminology

Millimeter water (4°C): A unit of pressure from a 1 mm column of pure water at 4 °C under standard gravity, used to measure very low pressures.
Hectopascal [hPa]: A metric pressure unit equal to 100 pascals, used widely in meteorology and atmospheric sciences.

Quick Knowledge Check

What pressure does a millimeter water (4°C) correspond to?

Pressure exerted by a 1 mm water column at 4°C

Pressure from a 1 meter air column

Standard atmospheric pressure

Which unit is numerically identical to the hectopascal?

Pound per square inch

Millibar

Atmosphere

In what field is the hectopascal commonly used?

Meteorology

Structural engineering

Sound measurement

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