Foot-pound per second to Pound-inch
Compare Foot-pound per second and Pound-inch. See why these engineering units measure different physical quantities, plus links to valid conversions.
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Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Use the converter to see the formula.
Foot-pound per second and Pound-inch measure different quantities, so no single result applies.
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Formula
Foot-pound per second (ft-lb/s) measures power, while Pound-inch (lb in) measures torque (rotational force). These are different physical quantities, so there is no single multiplication factor that converts one into the other.
ft-lb/s relates to its own power base unit by a factor of 1.35582. lb in relates to its own torque (rotational force) base unit by a factor of 0.112985.
Conversion table
| Foot-pound per second (ft-lb/s) | 1.35582 × power base unit |
| Pound-inch (lb in) | 0.112985 × torque (rotational force) base unit |
Related conversions
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Frequently asked questions
Can Foot-pound per second be converted to Pound-inch?
Not directly. Foot-pound per second measures power and Pound-inch measures torque (rotational force). Converting between different physical quantities needs an extra physical relationship (such as area, distance, or time), not just a unit ratio.
What is Foot-pound per second used for?
The Foot-pound per second (ft-lb/s) is a unit of power. Mechanical power rate.
What is Pound-inch used for?
The Pound-inch (lb in) is a unit of torque (rotational force). Torque from one pound-force at one inch.
Why does the converter show an incompatible units message?
The Universal Converter only calculates a numeric result when both units share the same physical dimension. Since Foot-pound per second and Pound-inch don't, the tool flags them as not directly compatible rather than returning a meaningless number.
What should I convert Foot-pound per second to instead?
Use another power unit, such as one of the related Foot-pound per second conversions linked below.
What should I convert Pound-inch to instead?
Use another torque (rotational force) unit, such as one of the related Pound-inch conversions linked below.
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About this conversion
This page compares Foot-pound per second (ft-lb/s) and Pound-inch (lb in) within the engineering converter.
Mechanical power rate. Torque from one pound-force at one inch.
Because Foot-pound per second measures power and Pound-inch measures torque (rotational force), the two units are not directly convertible: there is no fixed ratio that turns one into the other without additional information.
The calculator above will report that these units are not compatible. For a working result, choose two units from the same measurement family — see the related conversions below.