Pascal Converter
Convert Pascal to Inch Mercury 32 176 F and more • 57 conversions
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Unit Explanations
PascalPa
Source UnitThe pascal (Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength. It is defined as one newton per square meter. In other words, it is the pressure exerted by a force of one newton acting uniformly over an area of one square meter. The pascal is a crucial unit in engineering, physics, and meteorology, providing a standard measure for atmospheric pressure, material strength, and force distribution. It allows for consistent and comparable measurements across various scientific and industrial fields.
Current Use
The pascal is widely used in various fields to measure pressure and stress. In meteorology, it is used to express atmospheric pressure, often in the form of hectopascals (hPa). In engineering, it helps evaluate the strength of materials and structures. The unit is also crucial in fluid mechanics, where it is used to determine fluid pressure in pipes and vessels. The pascal's versatility makes it a fundamental unit in both scientific research and practical applications, especially where precise pressure measurements are critical.
Fun Fact
The pascal is named after Blaise Pascal, who made significant contributions to the understanding of fluid pressure.
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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Pascal
pressure • SI Unit
Definition
The pascal (Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength. It is defined as one newton per square meter. In other words, it is the pressure exerted by a force of one newton acting uniformly over an area of one square meter. The pascal is a crucial unit in engineering, physics, and meteorology, providing a standard measure for atmospheric pressure, material strength, and force distribution. It allows for consistent and comparable measurements across various scientific and industrial fields.
History & Origin
The pascal was named in honor of Blaise Pascal, a French mathematician, physicist, and inventor known for his contributions to fluid mechanics and the study of pressure. The unit was officially adopted as the SI unit for pressure in 1971, although the concept of pressure itself dates back to early scientific studies of fluids and gases. The pascal provided a standardized way to measure pressure, replacing a variety of non-standard units previously in use across different regions and industries.
Etymology: The term 'pascal' is derived from the name of Blaise Pascal.
Current Use
The pascal is widely used in various fields to measure pressure and stress. In meteorology, it is used to express atmospheric pressure, often in the form of hectopascals (hPa). In engineering, it helps evaluate the strength of materials and structures. The unit is also crucial in fluid mechanics, where it is used to determine fluid pressure in pipes and vessels. The pascal's versatility makes it a fundamental unit in both scientific research and practical applications, especially where precise pressure measurements are critical.
💡 Fun Facts
- •The pascal is named after Blaise Pascal, who made significant contributions to the understanding of fluid pressure.
- •One pascal is a very small pressure; it is equivalent to the pressure of a dollar bill lying flat on a table.
- •The human eardrum can detect pressure changes as small as 20 micropascals.
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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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