bar (bar) to megapascals (MPa) conversion

bar to megapascals conversion table

bar (bar)megapascals (MPa)
00
10.1
20.2
30.3
40.4
50.5
60.6
70.7
80.8
90.9
101
202
303
404
505
606
707
808
909
10010
1000100

How to convert bar to megapascals?

Converting between bar and megapascals (MPa) is essential in various fields like engineering, physics, and industry where pressure measurements are common. Understanding the conversion and its applications can be very useful.

Understanding the Conversion

The bar and megapascal (MPa) are both units of pressure. The relationship between them is straightforward.

  • 1 bar is defined as 100,000 pascals (Pa).
  • 1 megapascal (MPa) is defined as 1,000,000 pascals (Pa).

From these definitions, we can derive the conversion factor between bar and MPa.

Converting bar to megapascals (MPa)

To convert bar to megapascals, we use the following relationship:

1 bar=0.1 MPa1 \text{ bar} = 0.1 \text{ MPa}

Therefore, to convert any value in bar to MPa, multiply it by 0.1.

For example:

5 bar=5×0.1 MPa=0.5 MPa5 \text{ bar} = 5 \times 0.1 \text{ MPa} = 0.5 \text{ MPa}

Converting megapascals (MPa) to bar

To convert megapascals to bar, we use the reciprocal relationship:

1 MPa=10 bar1 \text{ MPa} = 10 \text{ bar}

Therefore, to convert any value in MPa to bar, multiply it by 10.

For example:

2 MPa=2×10 bar=20 bar2 \text{ MPa} = 2 \times 10 \text{ bar} = 20 \text{ bar}

Step-by-Step Instructions

  1. Bar to MPa:

    • Take the pressure value in bar.
    • Multiply it by 0.1.
    • The result is the equivalent pressure in MPa.
  2. MPa to Bar:

    • Take the pressure value in MPa.
    • Multiply it by 10.
    • The result is the equivalent pressure in bar.

Pascal's Law

The conversion between pressure units is underpinned by fundamental principles of physics, notably Pascal's Law. Blaise Pascal (1623-1662) was a French mathematician, physicist, and philosopher. Pascal's Law states that in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container. This principle is crucial in hydraulic systems and pressure measurement.

Real-World Examples

  1. Tire Pressure:
    • Car tires might be inflated to 2.5 bar. Converting to MPa:

      2.5 bar=2.5×0.1 MPa=0.25 MPa2.5 \text{ bar} = 2.5 \times 0.1 \text{ MPa} = 0.25 \text{ MPa}

  2. Hydraulic Systems:
    • A hydraulic press operates at 200 bar. Converting to MPa:

      200 bar=200×0.1 MPa=20 MPa200 \text{ bar} = 200 \times 0.1 \text{ MPa} = 20 \text{ MPa}

    • Hydraulic systems are vital in heavy machinery, enabling the multiplication of force to lift or move heavy objects. For further reading, NASA provides an The Complete Guide to Hydraulics Systems.
  3. Industrial Processes:
    • A chemical reactor operates at 1.5 MPa. Converting to bar:

      1.5 MPa=1.5×10 bar=15 bar1.5 \text{ MPa} = 1.5 \times 10 \text{ bar} = 15 \text{ bar}

These conversions are vital for ensuring accuracy and safety in engineering designs and operational settings.

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 megapascals to other unit conversions.

What is bar?

The bar is a metric unit of pressure, widely used in science, engineering, and industry. It's a convenient unit because it is close to standard atmospheric pressure on Earth. Below is detailed information about bar, it's origin, and some real-world examples.

Definition of Bar

The bar is defined as exactly 100,000100,000 Pascals (105Pa10^5 Pa). The Pascal (Pa) is the SI unit of pressure, defined as one Newton per square meter (N/m2N/m^2). Therefore:

1bar=100,000Pa=105N/m21 \, bar = 100,000 \, Pa = 10^5 \, N/m^2

Origin and History

The bar was introduced by British physicist Sir Napier Shaw in 1909. The goal was to have a unit of pressure that was close to atmospheric pressure but based on the metric system. The term "bar" comes from the Greek word "βάρος" (baros) meaning "weight."

Relation to Atmospheric Pressure

Standard atmospheric pressure at sea level is approximately 1.013251.01325 bar. Because of this proximity, the bar and millibar (1 mbar = 0.001 bar) are frequently used in meteorology to measure atmospheric pressure. Historically, meteorologists used millibars, but now the SI unit, the hectopascal (hPa), is also widely used (1 hPa = 1 mbar).

Real-World Examples and Applications

  • Tire Pressure: Car and bicycle tire pressures are often measured in bar or PSI (pounds per square inch). For example, a car tire might be inflated to 2.5 bar.
  • Weather Reports: Atmospheric pressure in weather reports can be given in millibars or hectopascals, where 1013.25 mbar is standard atmospheric pressure.
  • Scuba Diving: Divers often use bar to measure the pressure of compressed air in their tanks. A typical scuba tank might be filled to 200 bar.
  • Industrial Processes: Many industrial processes, such as hydraulic systems and pressure testing, use bar as a convenient unit of measurement.
  • Geology: Pressures deep within the Earth are often measured in kilobars (kbar), where 1 kbar = 1000 bar.
  • Vacuum: While bar is not commonly used for measuring high vacuum, it's relevant when discussing rough or backing vacuum levels. For high vacuum, units like Torr or Pascal are more typical.

Interesting Facts

  • The bar is a metric unit but not an SI unit. The SI unit for pressure is the Pascal (Pa).
  • The millibar (mbar) is commonly used in meteorology.
  • 1 bar is approximately equal to 0.987 atmospheres (atm).

What is megapascals?

Megapascals are a crucial unit for measuring high pressure in various applications. Let's explore its definition, formation, and applications.

Understanding Megapascals (MPa)

A megapascal (MPa) is a unit of pressure derived from the SI (International System of Units). It's a multiple of the pascal (Pa), which itself is defined as one newton per square meter (N/m2N/m^2). The "mega" prefix indicates a factor of one million.

Formation of Megapascals

The relationship between megapascals and pascals can be expressed as:

1MPa=1,000,000Pa=1x106Pa1 MPa = 1,000,000 Pa = 1 x 10^6 Pa

Since 1Pa=1N/m21 Pa = 1 N/m^2, then:

1MPa=1,000,000N/m21 MPa = 1,000,000 N/m^2

This means one megapascal is equal to one million newtons of force applied over an area of one square meter.

Connection to Pascal's Law

While "megapascal" itself isn't directly tied to Pascal's Law, understanding Pascal's Law is fundamental to understanding pressure measurements in general. Pascal's Law states that pressure applied to a confined fluid is transmitted equally in all directions throughout the fluid. This principle is crucial in hydraulic systems, where a small force applied over a small area can be multiplied to create a large force over a larger area. This amplification is directly related to pressure, and therefore megapascals are often used to quantify the pressure within these systems.

Real-World Examples of Megapascals

  • Hydraulic Systems: Hydraulic systems in heavy machinery (e.g., excavators, cranes) often operate at pressures ranging from 20 to 35 MPa or even higher.
  • Material Strength: The tensile strength of steel is often measured in megapascals. For example, high-strength steel may have a tensile strength of 500 MPa or more.
  • Geology: Pressure within the Earth's crust is measured in megapascals or even gigapascals (GPa). For instance, pressure at a depth of a few kilometers can reach hundreds of MPa.
  • High-Pressure Processing (HPP) of Food: This food preservation technique uses pressures of hundreds of MPa to inactivate microorganisms and extend shelf life.
  • Automotive Engineering: Hydraulic braking systems in cars typically operate in the range of 10-15 MPa.

Additional Resources

For more information, you can refer to:

Complete bar conversion table

Enter # of bar
Convert 1 bar to other unitsResult
bar to pascals (bar to Pa)100000
bar to kilopascals (bar to kPa)100
bar to megapascals (bar to MPa)0.1
bar to hectopascals (bar to hPa)1000
bar to millibar (bar to mbar)1000
bar to torr (bar to torr)750.06168270417
bar to meters of water @ 4°C (bar to mH2O)10.197162129779
bar to millimeters of mercury (bar to mmHg)750.06375541921
bar to pounds per square inch (bar to psi)14.503768078
bar to kilopound per square inch (bar to ksi)0.014503768078
bar to Inches of mercury (bar to inHg)29.529980572285