Bar Converter
Convert Bar to Picopascal 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.
PicopascalpPa
Target UnitThe picopascal (pPa) is a subunit of pressure in the International System of Units (SI), defined as one trillionth (10^-12) of a pascal (Pa). The pascal, named after the French mathematician and physicist Blaise Pascal, is the SI unit of pressure, defined as one newton per square meter. The picopascal, therefore, provides a means to express extremely low pressures, which are often encountered in high-vacuum physics and certain environmental measurements, making it crucial for scientific and technical applications where precision is paramount.
Current Use
Today, the picopascal is widely used in fields requiring precise measurements of low pressure, such as in vacuum technology, meteorology, and aerospace. Instruments capable of measuring pressures in picopascals are essential for experiments in high-energy physics and for monitoring environmental conditions at altitudes where atmospheric pressure is extremely low.
Fun Fact
The picopascal is so small that it can measure pressures in conditions such as space, where traditional units would be impractical.
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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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Picopascal
pressure • Non-SI
Definition
The picopascal (pPa) is a subunit of pressure in the International System of Units (SI), defined as one trillionth (10^-12) of a pascal (Pa). The pascal, named after the French mathematician and physicist Blaise Pascal, is the SI unit of pressure, defined as one newton per square meter. The picopascal, therefore, provides a means to express extremely low pressures, which are often encountered in high-vacuum physics and certain environmental measurements, making it crucial for scientific and technical applications where precision is paramount.
History & Origin
The picopascal was introduced in the context of the metric system as a means to express very low pressure values, which became essential for modern physics and engineering. The pascal, as the base unit, was adopted in 1971 during the 14th CGPM, and subunits like the picopascal followed as the need for more precise measurements in low-pressure scenarios increased, particularly in the fields of meteorology and vacuum technology.
Etymology: The term 'pico' is derived from the Spanish word for 'small', and in scientific terminology, it denotes a factor of 10^-12. Thus, 'picopascal' directly translates to one trillionth of a pascal.
Current Use
Today, the picopascal is widely used in fields requiring precise measurements of low pressure, such as in vacuum technology, meteorology, and aerospace. Instruments capable of measuring pressures in picopascals are essential for experiments in high-energy physics and for monitoring environmental conditions at altitudes where atmospheric pressure is extremely low.
💡 Fun Facts
- •The picopascal is so small that it can measure pressures in conditions such as space, where traditional units would be impractical.
- •One picopascal is equivalent to 0.000000000001 pascals, showcasing the extreme precision required in specific scientific applications.
- •The concept of picopascal is not only used in physics but also in geosciences for measuring low ground pressure variations.
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