What Is This Tool?
This converter transforms pressure values measured in inch water at 60°F, a unit representing the pressure exerted by water at a specific temperature, into inch mercury at 32°F, a standard manometric pressure unit often used in meteorology and HVAC applications.
How to Use This Tool?
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Enter the pressure value measured in inch water (60°F)
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Select inch water (60°F) as the input unit and inch mercury (32°F) as the output unit
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Run the conversion to get the equivalent pressure in inch mercury (32°F)
Key Features
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Converts small pressure measurements between inch water (60°F) and inch mercury (32°F)
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Includes temperature-specific definitions for accurate unit meaning
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Supports pressure comparisons in HVAC, meteorology, aviation, gas service, and laboratory fields
Examples
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10 inch water (60°F) equals approximately 0.735 inch mercury (32°F)
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25 inch water (60°F) equals approximately 1.837 inch mercury (32°F)
Common Use Cases
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Measuring duct and filter pressure drops in HVAC systems
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Specifying low pressures for residential gas service and regulator settings
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Reporting atmospheric pressure in meteorology and aviation
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Monitoring vacuum levels in laboratory and automotive diagnostics
Tips & Best Practices
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Ensure the inch water pressure measurements specify 60°F for consistency
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Use inch mercury values defined at 32°F to avoid inaccuracies
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Apply this conversion primarily for low-pressure ranges typical in manometric measurements
Limitations
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Pressure values in inch water depend on water temperature and should specify 60°F
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Inch mercury pressures are defined at 32°F, and temperature variations affect accuracy
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Conversion is suitable only for typical manometric pressure ranges, not very high pressures
Frequently Asked Questions
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Why does inch water pressure depend on temperature?
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Because the density of water changes with temperature, inch water pressure measurements specify 60°F to maintain consistent accuracy.
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What is an inch mercury (32°F) used for?
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Inch mercury (32°F) is often used to report atmospheric pressure, indicate vacuum levels, and assist in HVAC, refrigeration, and laboratory pressure measurements.
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Can I use this converter for very high pressures?
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No, this conversion is designed for typical manometric pressure ranges and is not appropriate for very high pressure measurements.
Key Terminology
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Inch water (60°F) [inAq]
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A unit of pressure reflecting the hydrostatic pressure from a 1-inch water column at 60°F, used for measuring small pressure differences.
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Inch mercury (32°F) [inHg]
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A manometric pressure unit defined by the pressure from a 1-inch mercury column at 32°F under standard gravity.
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Manometric pressure
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Pressure measured relative to atmospheric pressure using fluid columns such as water or mercury.