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millimeters of mercury to meters of water @ 4°C conversion

millimeters of mercury to meters of water @ 4°C conversion table

millimeters of mercury (mmHg)meters of water @ 4°C (mH2O)
00
10.01359506049466
20.02719012098933
30.04078518148399
40.05438024197866
50.06797530247332
60.08157036296799
70.09516542346265
80.1087604839573
90.122355544452
100.1359506049466
200.2719012098933
300.4078518148399
400.5438024197866
500.6797530247332
600.8157036296799
700.9516542346265
801.0876048395731
901.2235554445198
1001.3595060494664
100013.595060494664

How to convert millimeters of mercury to meters of water @ 4°c?

Millimeters of mercury (mmHg) and meters of water (mH₂O) are both units of pressure commonly used in various scientific and engineering fields. To convert pressure from mmHg to mH₂O, you'll use the fact that the pressure exerted by a 1-meter column of water at 4°C (where water is at its maximum density, approximately 1000 kg/m³) is known.

Conversion Formula

  1. Find the pressure in Pascals (Pa):

    • 1 mmHg = 133.322 Pa

  2. Convert Pascals to meters of water (mH₂O):

    • The pressure exerted by a 1-meter column of water (at 4°C) is given by the hydrostatic equation: P=ρgh P = \rho g h Where: ρ≈1000 kg/m3 (density of water at 4°C) \rho \approx 1000 \, \text{kg/m}^3 \, (\text{density of water at 4°C}) g≈9.81 m/s2 (acceleration due to gravity) g \approx 9.81 \, \text{m/s}^2 \, (\text{acceleration due to gravity}) P=1000 kg/m3×9.81 m/s2×1 m=9810 Pa/m P = 1000 \, \text{kg/m}^3 \times 9.81 \, \text{m/s}^2 \times 1 \, \text{m} = 9810 \, \text{Pa/m}

Since 1 mH₂O = 9810 Pa, to convert from mmHg to mH₂O: mH₂O=133.322 Pa9810 Pa/m=0.0136 mH₂O \text{mH₂O} = \frac{133.322 \, \text{Pa}}{9810 \, \text{Pa/m}} = 0.0136 \, \text{mH₂O}

Summary

Therefore, 1 mmHg ≈ 0.0136 mH₂O

Real-World Examples of mmHg

  1. Blood Pressure Measurement:

    • Blood pressure readings are commonly given in millimeters of mercury (mmHg). A typical healthy range is around 120/80 mmHg, where 120 mmHg is the systolic pressure and 80 mmHg is the diastolic pressure.

  2. Barometric Pressure:

    • Atmospheric pressure at sea level is approximately 760 mmHg. This is equivalent to 1 atmosphere (atm) of pressure.

  3. Vacuum Systems:

    • Pressure in vacuum systems can often be measured in mmHg. For instance, a high vacuum might have a pressure of 0.001 mmHg.

  4. Medical Applications:

    • Intraocular pressure, important for diagnosing glaucoma, is measured in mmHg. Normal pressure ranges from 12-22 mmHg.

  5. Respiratory Devices:

    • Devices like CPAP machines (used for sleep apnea) may also measure airflow pressure in mmHg.

Understanding how to convert between different units of pressure and recognizing where they are used helps in various applications spanning medicine, meteorology, and engineering fields.

See below section for step by step unit conversion with formulas and explanations. Please refer to the table below for a list of all the meters of water @ 4°C to other unit conversions.

What is millimeters of mercury?

Millimeters of mercury (mmHg) is a unit of measurement used to express pressure, specifically atmospheric pressure. It's commonly used in medicine and physiology to measure blood pressure.

In essence, mmHg measures the pressure exerted by a column of mercury, which is a dense liquid metal, against a surface. The "millimeter" refers to the height of the mercury column, while the "mercury" part comes from the use of mercury as the liquid in the measuring device.

A standard barometer (an instrument that measures atmospheric pressure) uses a column of mercury to measure pressure. When the air pressure is high, the mercury level rises, and when it's low, the level drops. This allows for a direct measurement of the pressure in terms of millimeters of mercury.

In medical contexts, blood pressure readings are expressed in mmHg (systolic pressure) over mmHg (diastolic pressure). For example:

  • A blood pressure reading of 120/80 mmHg means that the systolic pressure is 120 mmHg and the diastolic pressure is 80 mmHg.

The use of mmHg as a unit of measurement has been largely replaced by other units, such as kilopascals (kPa), in scientific and technical applications. However, it remains a widely recognized and used unit in medical and physiological contexts.

What is meters of water @ 4°c?

The term "meters of water" or "m" is a unit of measurement used to express the pressure exerted by a column of water. Specifically, it's defined as the pressure exerted by a column of fresh water that is 1 meter (or 3.2808 feet) high.

So, in this case, "meters of water @ 4°C" is referring to the pressure equivalent of a certain height of fresh water at a temperature of 4 degrees Celsius (39.2°F).

To give you an idea of what that means, here are some examples:

  • At sea level and 4°C, 1 meter of water is equivalent to about 9.80 kilograms per square centimeter (kg/cm²) or 10.21 pounds per square inch (psi).
  • A depth of 10 meters of water at 4°C would be approximately 98 kg/cm² or 102.12 psi.

Keep in mind that this value can vary slightly depending on the temperature and salinity of the water, but for most practical purposes, "meters of water @ 4°C" is a reliable way to express pressure equivalent.

Complete millimeters of mercury conversion table

Enter # of millimeters of mercury
Convert 1 mmHg to other unitsResult
millimeters of mercury to pascals (mmHg to Pa)133.322
millimeters of mercury to kilopascals (mmHg to kPa)0.133322
millimeters of mercury to megapascals (mmHg to MPa)0.000133322
millimeters of mercury to hectopascals (mmHg to hPa)1.33322
millimeters of mercury to bar (mmHg to bar)0.00133322
millimeters of mercury to torr (mmHg to torr)0.9999972366149
millimeters of mercury to meters of water @ 4°C (mmHg to mH2O)0.01359506049466
millimeters of mercury to pounds per square inch (mmHg to psi)0.01933671367695
millimeters of mercury to kilopound per square inch (mmHg to ksi)0.00001933671367695
millimeters of mercury to Inches of mercury (mmHg to inHg)0.03936996069858

Pressure conversions