Bar Converter
Convert Bar to Micropascal 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.
MicropascalµPa
Target UnitThe micropascal (µPa) is a unit of pressure in the SI system, defined as one millionth of a pascal (1 µPa = 10⁻⁶ Pa). It is used to measure very low pressures, particularly in scientific contexts such as atmospheric studies, fluid dynamics, and acoustics. The pascal is the SI derived unit of pressure, named after Blaise Pascal, and is defined as one newton per square meter. Therefore, the micropascal is equivalent to 0.00001 millibar and is crucial for applications requiring precision in low-pressure measurements.
Current Use
Today, the micropascal is widely used in scientific research, particularly in the fields of meteorology, oceanography, and aerodynamics. It is essential for measuring atmospheric pressure variations, sound pressure levels, and other low-pressure applications. Instruments that measure in micropascals are often utilized in laboratories and fieldwork where precision is crucial, and it is also used in specialized engineering contexts such as HVAC systems and aerospace.
Fun Fact
The micropascal is so small that everyday atmospheric pressure is equivalent to approximately 101325000 µPa.
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= × 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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Micropascal
pressure • Non-SI
Definition
The micropascal (µPa) is a unit of pressure in the SI system, defined as one millionth of a pascal (1 µPa = 10⁻⁶ Pa). It is used to measure very low pressures, particularly in scientific contexts such as atmospheric studies, fluid dynamics, and acoustics. The pascal is the SI derived unit of pressure, named after Blaise Pascal, and is defined as one newton per square meter. Therefore, the micropascal is equivalent to 0.00001 millibar and is crucial for applications requiring precision in low-pressure measurements.
History & Origin
The pascal was introduced in 1971 by the General Conference on Weights and Measures (CGPM) and subsequently adopted as a unit of pressure in the SI system. The micropascal, being a subdivision of the pascal, allows for the quantification of much lower pressures essential in various scientific fields. The unit was developed to address the need for more precise pressure measurements in contexts such as meteorology and engineering, particularly where conventional units were insufficient.
Etymology: The name 'pascal' is derived from the French mathematician and physicist Blaise Pascal, who made significant contributions to fluid mechanics and pressure.
Current Use
Today, the micropascal is widely used in scientific research, particularly in the fields of meteorology, oceanography, and aerodynamics. It is essential for measuring atmospheric pressure variations, sound pressure levels, and other low-pressure applications. Instruments that measure in micropascals are often utilized in laboratories and fieldwork where precision is crucial, and it is also used in specialized engineering contexts such as HVAC systems and aerospace.
💡 Fun Facts
- •The micropascal is so small that everyday atmospheric pressure is equivalent to approximately 101325000 µPa.
- •In underwater acoustics, sound pressure levels can be measured in micropascals to detect subtle changes in marine environments.
- •The term 'pascal' as a unit of pressure has become synonymous with high-tech fields, often appearing in the context of advanced research and development.
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