Bar Converter
Convert Bar to Millimeter Water 4 176 C 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.
Millimeter of Water at 4°CmmH2O
Target UnitThe millimeter of water at 4°C (mmH2O) is a unit of pressure defined as the pressure exerted by a column of pure water at 4 degrees Celsius, at a height of one millimeter. This measurement is based on the unique property of water, which reaches its maximum density at this temperature, providing a standardized reference point for pressure measurements. It is commonly used in various scientific and engineering applications where low pressure ranges are analyzed, particularly in fluid dynamics and hydraulics.
Current Use
Today, the millimeter of water at 4°C is widely utilized in various industries for measuring low pressures, especially in fields such as hydrology, meteorology, and HVAC systems. This unit is particularly useful in applications involving fluid dynamics and pressure drop calculations in piping systems. Engineers and scientists often rely on this measurement to ensure the proper functioning of systems that depend on precise pressure readings.
Fun Fact
Water is most dense at 4°C, making it an ideal reference for pressure measurements.
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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'.
📏 Real-World Examples
🔗 Related Units
Millimeter of Water at 4°C
pressure • Non-SI
Definition
The millimeter of water at 4°C (mmH2O) is a unit of pressure defined as the pressure exerted by a column of pure water at 4 degrees Celsius, at a height of one millimeter. This measurement is based on the unique property of water, which reaches its maximum density at this temperature, providing a standardized reference point for pressure measurements. It is commonly used in various scientific and engineering applications where low pressure ranges are analyzed, particularly in fluid dynamics and hydraulics.
History & Origin
The millimeter of water as a unit of pressure originated from the need to measure fluid pressures in engineering and science. Water's unique properties, especially at 4°C, were utilized to create a reliable standard for pressure measurement. Historically, various units based on water columns have been used, such as inches of mercury, but the millimeter of water provides a more practical scale for many applications.
Etymology: The term 'millimeter' derives from the metric system, where 'milli-' signifies one-thousandth, combined with 'meter,' the base unit of length. 'Water' refers to the common fluid used to establish pressure in this context.
Current Use
Today, the millimeter of water at 4°C is widely utilized in various industries for measuring low pressures, especially in fields such as hydrology, meteorology, and HVAC systems. This unit is particularly useful in applications involving fluid dynamics and pressure drop calculations in piping systems. Engineers and scientists often rely on this measurement to ensure the proper functioning of systems that depend on precise pressure readings.
💡 Fun Facts
- •Water is most dense at 4°C, making it an ideal reference for pressure measurements.
- •1 mmH2O is approximately equal to 9.81 pascals.
- •The millimeter of water is often used in barometers for measuring atmospheric pressure.
📏 Real-World Examples
🔗 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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Yes! MetricConv uses internationally standardized conversion factors from organizations like NIST and ISO. Our calculations support up to 15 decimal places of precision, making it suitable for scientific, engineering, and everyday calculations.
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