millibar (mbar) | Inches of mercury (inHg) |
---|---|
0 | 0 |
1 | 0.02952998057228 |
2 | 0.05905996114457 |
3 | 0.08858994171685 |
4 | 0.1181199222891 |
5 | 0.1476499028614 |
6 | 0.1771798834337 |
7 | 0.206709864006 |
8 | 0.2362398445783 |
9 | 0.2657698251506 |
10 | 0.2952998057228 |
20 | 0.5905996114457 |
30 | 0.8858994171685 |
40 | 1.1811992228914 |
50 | 1.4764990286142 |
60 | 1.7717988343371 |
70 | 2.0670986400599 |
80 | 2.3623984457828 |
90 | 2.6576982515056 |
100 | 2.9529980572285 |
1000 | 29.529980572285 |
Converting between millibars (mbar) and inches of mercury (inHg) involves understanding the relationship between these two units of pressure. Here's a guide to help you perform these conversions accurately.
Millibars and inches of mercury are both units used to measure pressure, commonly in meteorology and aviation. Converting between them requires a specific conversion factor. The conversion is the same between base 10 and base 2.
To convert millibars to inches of mercury, you can use the following conversion factor:
Therefore, to convert 1 millibar to inches of mercury:
So, 1 millibar is equal to approximately 0.02953 inches of mercury.
To convert inches of mercury to millibars, you use the reciprocal of the above conversion factor:
Therefore, to convert 1 inch of mercury to millibars:
So, 1 inch of mercury is equal to approximately 33.8639 millibars.
Evangelista Torricelli: The unit "inches of mercury" has historical significance, linked to Evangelista Torricelli's experiments in the 17th century. Torricelli, an Italian physicist and mathematician, invented the mercury barometer in 1643. His experiment demonstrated that atmospheric pressure could support a column of mercury to a certain height, which led to the use of mercury levels as a pressure measurement.
Here are a few examples of converting common pressure values:
Standard Atmospheric Pressure:
Aviation Altimeters:
Meteorological Reports:
High-Pressure System:
These examples highlight how these conversions are used in practical scenarios, especially in fields like aviation and meteorology, where accurate pressure readings are crucial.
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 Inches of mercury to other unit conversions.
The millibar (mbar) is a unit of pressure commonly used in meteorology to measure atmospheric pressure. Understanding millibars helps in interpreting weather patterns and forecasts. Below is an overview of millibars, their relation to other units, and their significance.
A millibar is defined as 100 Pascals (Pa), where a Pascal is the SI unit of pressure (force per unit area). The prefix "milli-" indicates one-thousandth, so:
Another unit of pressure is standard atmosphere (atm)
The term "bar" comes from the Greek word "báros," meaning weight. The bar was introduced by the British physicist Napier Shaw in 1909, and the millibar soon followed as a more practical unit for meteorology because typical atmospheric pressures on Earth are close to 1000 mbar.
Atmospheric pressure is a critical factor in weather forecasting. Here's how millibars are used:
The "inches of mercury" (inHg) is a unit of pressure commonly used in the United States. It's based on the height of a column of mercury that the given pressure will support. This unit is frequently used in aviation, meteorology, and vacuum applications.
Inches of mercury is a manometric unit of pressure. It represents the pressure exerted by a one-inch column of mercury at a standard temperature (usually 0°C or 32°F) under standard gravity.
The basic principle is that atmospheric pressure can support a certain height of a mercury column in a barometer. Higher atmospheric pressure corresponds to a higher mercury column, and vice versa. Therefore, the height of this column, measured in inches, serves as a direct indication of the pressure.
Here's how inches of mercury relates to other pressure units:
The concept of measuring pressure using a column of liquid is closely linked to Evangelista Torricelli, an Italian physicist and mathematician. In 1643, Torricelli invented the mercury barometer, demonstrating that atmospheric pressure could support a column of mercury. His experiments led to the understanding of vacuum and the quantification of atmospheric pressure. Britannica - Evangelista Torricelli has a good intro about him.
Aviation: Aircraft altimeters use inches of mercury to indicate altitude. Pilots set their altimeters to a local pressure reading (inHg) to ensure accurate altitude readings. Standard sea level pressure is 29.92 inHg.
Meteorology: Weather reports often include atmospheric pressure readings in inches of mercury. These readings are used to track weather patterns and predict changes in weather conditions. For example, a rising barometer (increasing inHg) often indicates improving weather, while a falling barometer suggests worsening weather.
Vacuum Systems: In various industrial and scientific applications, inches of mercury is used to measure vacuum levels. For example, vacuum pumps might be rated by the amount of vacuum they can create, expressed in inches of mercury. Higher vacuum levels (i.e., more negative readings) are crucial in processes like freeze-drying and semiconductor manufacturing. For example, common home vacuum cleaners operate in a range of 50 to 80 inHg.
Medical Equipment: Some medical devices, such as sphygmomanometers (blood pressure monitors), historically used mmHg (millimeters of mercury), a related unit. While digital devices are common now, the underlying principle remains tied to pressure measurement.
Standard Atmospheric Pressure: Standard atmospheric pressure at sea level is approximately 29.92 inches of mercury (inHg). This value is often used as a reference point for various measurements and calculations.
Altitude Dependence: Atmospheric pressure decreases with altitude. As you ascend, the weight of the air above you decreases, resulting in lower pressure readings in inches of mercury.
Temperature Effects: While "inches of mercury" typically refers to a standardized temperature, variations in temperature can slightly affect the density of mercury and, consequently, the pressure reading.
Convert 1 mbar to other units | Result |
---|---|
millibar to pascals (mbar to Pa) | 100 |
millibar to kilopascals (mbar to kPa) | 0.1 |
millibar to megapascals (mbar to MPa) | 0.0001 |
millibar to hectopascals (mbar to hPa) | 1 |
millibar to bar (mbar to bar) | 0.001 |
millibar to torr (mbar to torr) | 0.7500616827042 |
millibar to meters of water @ 4°C (mbar to mH2O) | 0.01019716212978 |
millibar to millimeters of mercury (mbar to mmHg) | 0.7500637554192 |
millibar to pounds per square inch (mbar to psi) | 0.014503768078 |
millibar to kilopound per square inch (mbar to ksi) | 0.000014503768078 |
millibar to Inches of mercury (mbar to inHg) | 0.02952998057228 |