Bar Converter
Convert Bar to Inch Mercury 32 176 F 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.
Inch of MercuryinHg
Target UnitAn inch of mercury (inHg) is a unit of pressure defined as the height of a column of mercury exactly one inch high at standard gravity (9.80665 m/s²) at a temperature of 0°C (32°F). It is commonly used in meteorology and aviation to express atmospheric pressure. The standard atmospheric pressure at sea level is defined as 29.92 inHg, which corresponds to 1013.25 hPa or 101.325 kPa. The inHg is derived from the density of mercury and the gravitational force acting on it, making it a practical unit for measuring pressure in various applications.
Current Use
The inch of mercury is widely used in meteorology to report atmospheric pressure and in aviation for altimeter settings. It remains a popular unit in the United States for weather forecasts, assisting pilots in determining altitude and weather conditions. While many countries have adopted SI units, the inHg is still prevalent in specific industries and applications, particularly in HVAC systems and barometric pressure measurements.
Fun Fact
An inch of mercury is defined based on the standard acceleration due to gravity, which varies slightly depending on location.
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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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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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Inch of Mercury
pressure • Non-SI
Definition
An inch of mercury (inHg) is a unit of pressure defined as the height of a column of mercury exactly one inch high at standard gravity (9.80665 m/s²) at a temperature of 0°C (32°F). It is commonly used in meteorology and aviation to express atmospheric pressure. The standard atmospheric pressure at sea level is defined as 29.92 inHg, which corresponds to 1013.25 hPa or 101.325 kPa. The inHg is derived from the density of mercury and the gravitational force acting on it, making it a practical unit for measuring pressure in various applications.
History & Origin
The inch of mercury unit originated in the context of barometric pressure measurement systems developed in the 17th century. The use of mercury in barometers was popularized by Evangelista Torricelli in 1643 when he created the first barometer. This device demonstrated that atmospheric pressure could support a column of mercury, leading to the standardization of pressure measurements in terms of mercury height.
Etymology: The term 'inch' is derived from the Latin 'uncia,' which means 'one-twelfth,' and 'mercury' refers to the element mercury, named after the Roman god Mercury due to its liquid metallic state and quicksilver appearance.
Current Use
The inch of mercury is widely used in meteorology to report atmospheric pressure and in aviation for altimeter settings. It remains a popular unit in the United States for weather forecasts, assisting pilots in determining altitude and weather conditions. While many countries have adopted SI units, the inHg is still prevalent in specific industries and applications, particularly in HVAC systems and barometric pressure measurements.
💡 Fun Facts
- •An inch of mercury is defined based on the standard acceleration due to gravity, which varies slightly depending on location.
- •Mercury is favored in barometers due to its high density, allowing for a more compact measurement system.
- •The term 'barometric pressure' is often used interchangeably with 'inches of mercury' in weather reports.
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Frequently Asked Questions
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To convert to , multiply your value by 1. For example, 10 equals 10 .
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