What Is This Tool?
This online converter transforms dynamic viscosity values from pound/foot/hour (an imperial engineering unit) to slug/foot/second (an imperial mass–length–time unit). It helps translate fluid viscosity data between two different representations used in engineering, fluid flow, and lubrication analyses.
How to Use This Tool?
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Enter the viscosity value in pound/foot/hour [lb/(ft*h)]
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Select the conversion to slug/foot/second
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Click convert to see the equivalent value in slug/foot/second
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Use the result for fluid dynamics, engineering, or aerodynamic calculations
Key Features
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Converts viscosity units from pound/foot/hour to slug/foot/second efficiently
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Supports imperial units commonly used in legacy engineering and fluid dynamics
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Browser-based and easy to use without any installation
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Facilitates integration of older data with modern engineering calculations
Examples
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10 lb/(ft*h) = 0.000086335972699004 slug/(ft·s)
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100 lb/(ft*h) = 0.00086335972699004 slug/(ft·s)
Common Use Cases
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Specifying lubricant or oil viscosity in US-customary engineering sheets
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Performing viscous flow calculations for piping, bearings, or rotating equipment in imperial units
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Reporting viscosity values for fuels and process fluids in technical documents using hour-based time units
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Conducting fluid dynamics assessments in petroleum, chemical processing, HVAC design, and mechanical equipment manufacturing
Tips & Best Practices
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Ensure input values correctly represent dynamic viscosity with consistent units
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Be mindful of the time unit difference between hour and second during conversions
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Use precise values to avoid rounding errors due to the small conversion factor
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Verify unit consistency when integrating with SI-based analyses
Limitations
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Conversion involves very small numerical factors, so rounding errors are possible
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Time units differ (hour versus second), requiring careful attention to dimensional consistency
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Specific to imperial units and may need additional conversion for SI unit compatibility
Frequently Asked Questions
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What does pound/foot/hour measure in viscosity?
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It measures dynamic viscosity as the fluid's resistance to shear, using force·time per unit area in imperial engineering units.
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Why convert viscosity from pound/foot/hour to slug/foot/second?
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To translate viscosity data into imperial mass–length–time units for accurate fluid dynamics modeling and integration with legacy or aerodynamic datasets.
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Can this conversion be used for SI units?
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No, this conversion is specific to imperial systems; further conversions are needed for SI unit analyses.
Key Terminology
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Pound/foot/hour [lb/(ft*h)]
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An imperial engineering unit indicating viscosity as force·time per unit area related to shear stress and velocity gradient.
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Slug/foot/second
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An imperial unit for dynamic viscosity defined as mass divided by length and time, used in fluid dynamics calculations.
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Dynamic viscosity
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A fluid's internal resistance to shear stress expressed as the ratio of shear stress to velocity gradient.