What Is This Tool?
This tool converts power values from pound-foot per hour (lbf*ft/h) to foot pound-force per hour (ft·lbf/hr), both of which represent very low power in mechanical work using imperial units. It is designed for engineering contexts and historic equipment requiring consistent unit representation.
How to Use This Tool?
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Enter the numerical value in pound-foot/hour (lbf*ft/h)
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Select the target unit as foot pound-force/hour (ft·lbf/hr)
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Click convert to see the equivalent value in the desired unit
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Use converted values to document or compare power ratings in engineering or restoration projects
Key Features
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Converts between pound-foot/hour and foot pound-force/hour units of power
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Supports low power measurements common in vintage or legacy mechanical systems
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Browser-based and easy-to-use interface
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Provides precise unit definitions without requiring knowledge of conversion formulas
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Ideal for documenting and comparing historic mechanical power ratings
Examples
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5 pound-foot/hour equals 5 foot pound-force/hour
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0.1 pound-foot/hour is the same as 0.1 foot pound-force/hour
Common Use Cases
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Expressing very low continuous mechanical output in legacy imperial units like small clocks or gear trains
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Documenting historical or vintage equipment specifications that use foot-pound units
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Estimating hand-crank or slow winch work rates when converting older imperial ratings to SI units
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Converting older imperial power specs to watts for modern engineering comparisons
Tips & Best Practices
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Ensure you understand the legacy definitions of these units for accurate usage
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Use this tool mainly for low power applications where these units are relevant
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Convert to SI units like watts if integrating measurements into modern systems
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Keep conversion consistency when documenting equipment to avoid errors
Limitations
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Units represent very low power and are non-SI, limiting their use in high power contexts
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Precision depends on correct legacy unit interpretation
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May require conversion to watts for broader applicability in modern systems
Frequently Asked Questions
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Are pound-foot/hour and foot pound-force/hour different units?
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No, they are equivalent units representing the same mechanical power rate, where 1 pound-foot/hour equals 1 foot pound-force/hour.
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What are typical applications for these power units?
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They are typically used for very low mechanical power outputs in fields like vintage machinery restoration, small motors, gear trains, and historical equipment documentation.
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Should I convert these units to watts?
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Yes, converting to watts is advisable when integrating with modern SI-based systems or when precision comparisons are needed.
Key Terminology
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Pound-foot per hour (lbf·ft/h)
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An imperial unit of power representing one foot-pound force of mechanical work done per hour.
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Foot pound-force per hour (ft·lbf/hr)
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A non-SI power unit representing one foot-pound force of work or energy transferred every hour.
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Mechanical power
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The rate at which mechanical work is performed or energy is transferred.