Bar Converter
Convert Bar to Megapascal and more • 57 conversions
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Unit Explanations
Barbar
Source UnitThe bar is a metric unit of pressure, not part of the International System of Units (SI), but is commonly used in industry and meteorology. It is defined as exactly 100,000 pascals, which is slightly less than the average atmospheric pressure on Earth at sea level. One bar is equivalent to 0.987 atmospheres, 14.5038 pounds per square inch (psi), or 750.06 millimeters of mercury (mmHg). Although not an SI unit, it is accepted for use with the SI and is widely used due to its convenient size for many applications.
Current Use
The bar is widely used in various fields including meteorology for atmospheric pressure, and in industries such as automotive and aviation for tire pressure and cabin pressure monitoring. It is especially favored in contexts where moderate pressures need to be measured with a single-digit number, avoiding the unwieldy values that would result from using pascals.
Fun Fact
The bar is almost exactly the atmospheric pressure on Earth at sea level.
MegapascalMPa
Target UnitThe megapascal (MPa) is a derived unit of pressure in the International System of Units (SI) equal to one million pascals. It is commonly used in engineering, particularly in mechanical and civil engineering, to describe material strength and pressure in fluids. The pascal itself is defined as one newton per square meter, thus a megapascal corresponds to a force of one million newtons acting on an area of one square meter. This unit is crucial in contexts where high pressures are encountered, such as in hydraulic systems, material testing, and in the specification of materials like concrete and metals.
Current Use
The megapascal is predominantly used in the fields of engineering, materials science, and physics. It is essential for specifying material properties, such as tensile strength and compressive strength, and is used in hydraulic systems, structural engineering, and geotechnical engineering. Many industries such as automotive, aerospace, and construction rely on this unit for both design and testing purposes.
Fun Fact
The megapascal is often used to describe the mechanical properties of materials, such as how much stress they can withstand before failing.
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📐Conversion Formula
= × 1.00000How to Convert
To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.
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Bar
pressure • Non-SI
Definition
The bar is a metric unit of pressure, not part of the International System of Units (SI), but is commonly used in industry and meteorology. It is defined as exactly 100,000 pascals, which is slightly less than the average atmospheric pressure on Earth at sea level. One bar is equivalent to 0.987 atmospheres, 14.5038 pounds per square inch (psi), or 750.06 millimeters of mercury (mmHg). Although not an SI unit, it is accepted for use with the SI and is widely used due to its convenient size for many applications.
History & Origin
The bar as a unit of pressure was introduced in the early 20th century. It was created to provide a convenient metric unit for expressing pressures without having to resort to using large numbers, as can occur with the pascal. The bar was defined in 1909 by the International Union of Pure and Applied Chemistry (IUPAC) to be equivalent to 100,000 pascals, simplifying conversion with the SI system.
Etymology: The word 'bar' comes from the Greek word 'baros', meaning weight.
Current Use
The bar is widely used in various fields including meteorology for atmospheric pressure, and in industries such as automotive and aviation for tire pressure and cabin pressure monitoring. It is especially favored in contexts where moderate pressures need to be measured with a single-digit number, avoiding the unwieldy values that would result from using pascals.
💡 Fun Facts
- •The bar is almost exactly the atmospheric pressure on Earth at sea level.
- •The unit 'bar' is not an SI unit, but it's accepted for use with SI due to its practicality.
- •The word 'barometer', an instrument for measuring atmospheric pressure, shares its root with the unit 'bar'.
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Megapascal
pressure • Non-SI
Definition
The megapascal (MPa) is a derived unit of pressure in the International System of Units (SI) equal to one million pascals. It is commonly used in engineering, particularly in mechanical and civil engineering, to describe material strength and pressure in fluids. The pascal itself is defined as one newton per square meter, thus a megapascal corresponds to a force of one million newtons acting on an area of one square meter. This unit is crucial in contexts where high pressures are encountered, such as in hydraulic systems, material testing, and in the specification of materials like concrete and metals.
History & Origin
The concept of pressure dates back to the work of scientists such as Blaise Pascal in the 17th century, who formulated the principles of hydrostatics and fluid dynamics. The pascal was named in his honor in 1971, and the megapascal was subsequently derived as a multiple of this unit, becoming widely adopted in scientific and engineering disciplines.
Etymology: The term 'megapascal' is derived from the prefix 'mega-', which means one million, combined with 'pascal', the SI unit of pressure.
Current Use
The megapascal is predominantly used in the fields of engineering, materials science, and physics. It is essential for specifying material properties, such as tensile strength and compressive strength, and is used in hydraulic systems, structural engineering, and geotechnical engineering. Many industries such as automotive, aerospace, and construction rely on this unit for both design and testing purposes.
💡 Fun Facts
- •The megapascal is often used to describe the mechanical properties of materials, such as how much stress they can withstand before failing.
- •Many modern tires are inflated to pressures around 2.0 MPa, which is equivalent to 20 bar.
- •In geological contexts, the pressure exerted at a depth of 1 km in the Earth's crust can reach around 25 MPa due to the weight of overlying rock.
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Frequently Asked Questions
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