Bar Converter
Convert Bar to Pound Force Square Inch 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.
Pound Force per Square Inchpsi
Target UnitThe pound force per square inch (psi) is a unit of pressure defined as the force of one pound-force (lbf) applied uniformly over an area of one square inch. It is a common unit used in various engineering and scientific applications, particularly in the United States. The pound-force is a force unit derived from the pound, a unit of mass, using the acceleration due to gravity, approximately 32.174 ft/s². Therefore, 1 psi corresponds to a force of about 4.448 Newtons applied over an area of 0.00064516 square meters.
Current Use
Pound force per square inch is predominantly used in the United States for various practical applications, such as tire pressure and hydraulic systems. Many automotive and aerospace industries rely on psi as a standard measurement for pressure gauges. It is also commonly used in everyday products like air compressors and pneumatic tools, making it an essential unit in both professional and domestic settings.
Fun Fact
The psi unit is widely used in the US, while the rest of the world primarily uses pascals (Pa).
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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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💡 Pro Tip: For the reverse conversion ( → ), divide by the conversion factor instead of multiplying.
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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🔗 Related Units
Pound Force per Square Inch
pressure • Non-SI
Definition
The pound force per square inch (psi) is a unit of pressure defined as the force of one pound-force (lbf) applied uniformly over an area of one square inch. It is a common unit used in various engineering and scientific applications, particularly in the United States. The pound-force is a force unit derived from the pound, a unit of mass, using the acceleration due to gravity, approximately 32.174 ft/s². Therefore, 1 psi corresponds to a force of about 4.448 Newtons applied over an area of 0.00064516 square meters.
History & Origin
The concept of measuring pressure has ancient roots, with early civilizations using rudimentary methods to gauge force applied over areas. The specific unit psi emerged in the 19th century as engineers and scientists sought standardized measures for pressure in various applications, including hydraulics and pneumatics. The integration of the pound-force and the square inch into a single unit allowed for easier calculations and engineering practices, particularly in industries heavily influenced by British and American standards.
Etymology: The term 'pound' originates from the Latin word 'pondus,' meaning weight, while 'force' refers to the influence that causes an object to change its velocity, derived from the Latin 'fortis,' meaning strong. 'Square inch' combines the unit of area from the Latin 'area,' which denotes a level surface.
Current Use
Pound force per square inch is predominantly used in the United States for various practical applications, such as tire pressure and hydraulic systems. Many automotive and aerospace industries rely on psi as a standard measurement for pressure gauges. It is also commonly used in everyday products like air compressors and pneumatic tools, making it an essential unit in both professional and domestic settings.
💡 Fun Facts
- •The psi unit is widely used in the US, while the rest of the world primarily uses pascals (Pa).
- •One psi is equivalent to approximately 6894.76 pascals, illustrating the difference between imperial and metric systems.
- •The tire pressure monitoring systems in vehicles often alert drivers when tire pressure falls below a certain psi threshold, enhancing safety.
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🔗 Related Units
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Frequently Asked Questions
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To convert to , multiply your value by 1. For example, 10 equals 10 .
What is the formula for to conversion?▼
The formula is: = × 1. This conversion factor is based on international standards.
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