KSI to Foot-pound
Compare KSI and Foot-pound. 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.
KSI and Foot-pound measure different quantities, so no single result applies.
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Formula
KSI (ksi) measures pressure and mechanical stress, while Foot-pound (ft-lb) measures energy. These are different physical quantities, so there is no single multiplication factor that converts one into the other.
ksi relates to its own pressure and mechanical stress base unit by a factor of 6.89476e+06. ft-lb relates to its own energy base unit by a factor of 1.35582.
Conversion table
| KSI (ksi) | 6.89476e+06 × pressure and mechanical stress base unit |
| Foot-pound (ft-lb) | 1.35582 × energy base unit |
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Frequently asked questions
Can KSI be converted to Foot-pound?
Not directly. KSI measures pressure and mechanical stress and Foot-pound measures energy. Converting between different physical quantities needs an extra physical relationship (such as area, distance, or time), not just a unit ratio.
What is KSI used for?
The KSI (ksi) is a unit of pressure and mechanical stress. Kips per square inch.
What is Foot-pound used for?
The Foot-pound (ft-lb) is a unit of energy. Work from one pound-force over one foot.
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 KSI and Foot-pound don't, the tool flags them as not directly compatible rather than returning a meaningless number.
What should I convert KSI to instead?
Use another pressure and mechanical stress unit, such as one of the related KSI conversions linked below.
What should I convert Foot-pound to instead?
Use another energy unit, such as one of the related Foot-pound conversions linked below.
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About this conversion
This page compares KSI (ksi) and Foot-pound (ft-lb) within the engineering converter.
Kips per square inch. Work from one pound-force over one foot.
Because KSI measures pressure and mechanical stress and Foot-pound measures energy, 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.