Bar Converter
Convert Bar to Standard Atmosphere 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.
Standard Atmosphereatm
Target UnitThe standard atmosphere (atm) is a unit of pressure defined as precisely 101,325 pascals (Pa). It is commonly used to represent atmospheric pressure at sea level and is a crucial reference point in various scientific disciplines. This unit is derived from the average atmospheric pressure on Earth at sea level, which influences weather patterns, flight conditions, and various engineering applications. The standard atmosphere is also equivalent to 1013.25 hPa (hectopascals) or 760 mmHg (millimeters of mercury), enabling its use across different scientific fields.
Current Use
The standard atmosphere is extensively used in various fields including meteorology, aviation, and engineering. It serves as a reference for calculating altitudes, calibrating instruments, and understanding atmospheric conditions. In aviation, for instance, it is crucial for determining aircraft performance at different altitudes. The unit is also employed in the design of pressure-sensitive equipment and in the calibration of pressure gauges across laboratories and industrial settings.
Fun Fact
The standard atmosphere is defined as equivalent to the pressure exerted by a 760 mm column of mercury.
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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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Standard Atmosphere
pressure • Non-SI
Definition
The standard atmosphere (atm) is a unit of pressure defined as precisely 101,325 pascals (Pa). It is commonly used to represent atmospheric pressure at sea level and is a crucial reference point in various scientific disciplines. This unit is derived from the average atmospheric pressure on Earth at sea level, which influences weather patterns, flight conditions, and various engineering applications. The standard atmosphere is also equivalent to 1013.25 hPa (hectopascals) or 760 mmHg (millimeters of mercury), enabling its use across different scientific fields.
History & Origin
The concept of atmospheric pressure was first recognized in the 17th century when scientists like Galileo and Torricelli explored the behavior of gases. Torricelli's experiments with mercury led to the invention of the barometer, which provided the first means of measuring atmospheric pressure. The term 'standard atmosphere' was formalized in the 1950s as a reference point for various scientific calculations and applications, based on the average conditions observed on Earth.
Etymology: The word 'atmosphere' derives from the Greek words 'atmos' meaning 'vapor' and 'sphaira' meaning 'sphere', reflecting the gaseous envelope surrounding the Earth.
Current Use
The standard atmosphere is extensively used in various fields including meteorology, aviation, and engineering. It serves as a reference for calculating altitudes, calibrating instruments, and understanding atmospheric conditions. In aviation, for instance, it is crucial for determining aircraft performance at different altitudes. The unit is also employed in the design of pressure-sensitive equipment and in the calibration of pressure gauges across laboratories and industrial settings.
💡 Fun Facts
- •The standard atmosphere is defined as equivalent to the pressure exerted by a 760 mm column of mercury.
- •1 atm is approximately equal to 14.7 pounds per square inch (psi), commonly used in tire pressure measurements.
- •The concept of standard atmosphere is also related to the ideal gas law, which describes the behavior of gases under various conditions.
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