Bar Converter
Convert Bar to Femtopascal 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.
FemtopascalfPa
Target UnitThe femtopascal (fPa) is a unit of pressure in the metric system, representing one quadrillionth (10^-15) of a pascal. The pascal itself is the SI unit of pressure, defined as one newton per square meter. The femtopascal is typically used in scientific contexts where extremely low pressures are encountered, such as in certain high-energy physics experiments, atmospheric studies, and nanotechnology applications. Its precision allows researchers to quantify minuscule pressure variations that would be imperceptible at larger scales.
Current Use
Femtopascals are used primarily in high-precision scientific research, particularly in fields that deal with extremely low pressures, such as astrophysics, material science, and nanotechnology. Instruments designed to measure such minuscule pressures are typically employed in laboratories and specialized research facilities worldwide.
Fun Fact
The femtopascal is so small that it is often used in contexts where pressures are only a fraction of a pascal.
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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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Femtopascal
pressure • Non-SI
Definition
The femtopascal (fPa) is a unit of pressure in the metric system, representing one quadrillionth (10^-15) of a pascal. The pascal itself is the SI unit of pressure, defined as one newton per square meter. The femtopascal is typically used in scientific contexts where extremely low pressures are encountered, such as in certain high-energy physics experiments, atmospheric studies, and nanotechnology applications. Its precision allows researchers to quantify minuscule pressure variations that would be imperceptible at larger scales.
History & Origin
The concept of pressure measurement has ancient roots, but the formal definition of the pascal was established in 1971 during the 14th General Conference on Weights and Measures. The femtopascal emerged later as a necessary subdivision to express lower pressure thresholds encountered in specialized fields.
Etymology: The term 'femto' comes from the Danish word 'femten,' meaning fifteen, indicating the factor of 10^-15. 'Pascal' is named after Blaise Pascal, a French mathematician, physicist, and inventor, who made significant contributions to fluid mechanics and pressure studies.
Current Use
Femtopascals are used primarily in high-precision scientific research, particularly in fields that deal with extremely low pressures, such as astrophysics, material science, and nanotechnology. Instruments designed to measure such minuscule pressures are typically employed in laboratories and specialized research facilities worldwide.
💡 Fun Facts
- •The femtopascal is so small that it is often used in contexts where pressures are only a fraction of a pascal.
- •The pascal itself is a relatively new unit, established only in the 20th century.
- •In scientific literature, the femtopascal is frequently encountered in discussions of the vacuum of space, where pressures are extremely low.
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Frequently Asked Questions
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