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Inches of mercury to pounds per square inch conversion

Inches of mercury to pounds per square inch conversion table

Inches of mercury (inHg)pounds per square inch (psi)
00
10.491154
20.982308
31.473462
41.964616
52.45577
62.946924
73.438078
83.929232
94.420386
104.91154
209.82308
3014.73462
4019.64616
5024.5577
6029.46924
7034.38078
8039.29232
9044.20386
10049.1154
1000491.154

How to convert inches of mercury to pounds per square inch?

Inches of mercury (inHg) and pounds per square inch (psi) are both units used to measure pressure. To convert between these units, you need to use the known conversion factor:

1 inch of mercury (inHg) = 0.491154 psi

So to convert 1 inHg to psi, you'd use the following calculation:

1 inHg×0.491154 psi/inHg=0.491154 psi1 \, \text{inHg} \times 0.491154 \, \text{psi/inHg} = 0.491154 \, \text{psi}

Hence, 1 inch of mercury is equivalent to approximately 0.491 psi.

Real-World Examples of Inches of Mercury

  1. Atmospheric Pressure:

    • Standard atmospheric pressure at sea level is often measured as 29.92 inHg. To convert this to psi: 29.92 inHg×0.491154 psi/inHg=14.696 psi29.92 \, \text{inHg} \times 0.491154 \, \text{psi/inHg} = 14.696 \, \text{psi}
    • Atmospheric pressure decreases with altitude. For example, at 18,000 feet, the pressure drops to about 15 inHg.

  2. Barometric Pressure:

    • Weather forecasts often provide barometric pressure readings in inHg. A typical range might be around 28 to 30 inHg, indicating high or low-pressure systems which can influence weather conditions.

  3. Vacuum Systems:

    • Vacuum systems often measure pressure in inches of mercury below atmospheric pressure, such as -25 inHg, which indicates a strong vacuum.
    • For example, a high-quality vacuum pump might operate at a vacuum level of -29.9 inHg, which is very close to a perfect vacuum.

  4. Automotive:

    • In automotive applications, engine vacuum is sometimes used for functional diagnostics and is often measured in inches of mercury. Typical engine vacuum at idle might be around 18-22 inHg.

  5. Scientific Measurements:

    • Some laboratory instruments, like barometers used for scientific research, may provide pressure readings in inHg.

Understanding these conversions and real-world examples can help describe measurements common in various scientific, engineering, and everyday contexts. If further details or specific calculations are needed, feel free to ask!

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 pounds per square inch to other unit conversions.

What is inches of mercury?

Inches of mercury (inHg) is a unit of measurement used to express atmospheric pressure or the height of a column of mercury that would be exerting a given pressure.

In other words, it's a measure of how much pressure is being exerted on the atmosphere by gravity. The unit was originally defined as the pressure exerted by a column of mercury 1 inch (2.54 cm) high at sea level and at standard temperature (32°F/0°C).

To put it simply:

  • 1 inch of mercury is equivalent to about 25.4 millimeters of mercury
  • It's also equivalent to approximately 3386 pascals or 49.9 pounds per square inch

Inches of mercury are commonly used in weather forecasting, particularly for measuring the pressure of low-pressure systems such as hurricanes and typhoons. Weather forecasters often report barometric pressure using inches of mercury, especially when discussing tropical cyclones.

So, to summarize: inches of mercury is a unit of measurement that expresses atmospheric pressure or the height of a column of mercury exerting a given pressure!

What is pounds per square inch?

Pounds per square inch (PSI) is a unit of measurement that represents the force exerted on an area by a weight or pressure. It's commonly used to measure the pressure or force applied to a surface.

To calculate PSI, you multiply the weight (in pounds) by the area (in square inches) over which it's being applied:

PSI = Weight in pounds / Area in square inches

For example, if you have a 10-pound weight placed on an area of 1 square inch, the pressure would be:

PSI = 10 pounds / 1 square inch = 10 PSI

In practical terms, PSI is used to measure various pressures in everyday life, such as:

  • Water pressure: The pressure exerted by water flowing through pipes or held back by a dam.
  • Tire pressure: The air pressure inside a tire, which affects its performance and longevity.
  • Building construction: The weight-bearing capacity of a building's foundation or walls.
  • Industrial processes: The pressure applied to materials during manufacturing, such as in the production of rubber goods or plastics.

PSI is an important unit of measurement for various industries, including construction, engineering, and manufacturing.

Complete Inches of mercury conversion table

Enter # of Inches of mercury
Convert 1 inHg to other unitsResult
Inches of mercury to pascals (inHg to Pa)3386.3889532611
Inches of mercury to kilopascals (inHg to kPa)3.3863889532611
Inches of mercury to megapascals (inHg to MPa)0.003386388953261
Inches of mercury to hectopascals (inHg to hPa)33.863889532611
Inches of mercury to bar (inHg to bar)0.03386388953261
Inches of mercury to torr (inHg to torr)25.400005965738
Inches of mercury to meters of water @ 4°C (inHg to mH2O)0.345315571909
Inches of mercury to millimeters of mercury (inHg to mmHg)25.400076155931
Inches of mercury to pounds per square inch (inHg to psi)0.491154
Inches of mercury to kilopound per square inch (inHg to ksi)0.000491154

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