ksi

The ksi (kip per square inch) equals 1000 psi. It is the US unit for material strength and stress: A36 structural steel has a minimum yield strength of 36 ksi.

Symbol: ksi

Quantity: pressure, stress and differential pressure (force per unit area)

SI relation: 1 ksi = 6894757.293168 Pa (exact)

Derivation: 1 ksi = 1000 psi = 1 kip/in² = 6.894757293168 MPa

Exact: yes, by definition

Typical uses

Yield and tensile strength in ASTM and ASME material specifications
Structural steel design in the US (AISC)
Concrete strength in ksi (4–8 ksi)

Convert ksi to other units

1 ksi in other pressure units
Conversion	1 ksi equals	Reverse
ksi to pascal	6894757.293 Pa	pascal to ksi
ksi to kilopascal	6894.757293 kPa	kilopascal to ksi
ksi to kilogram-force per square centimetre	70.30695796 kgf/cm²	kilogram-force per square centimetre to ksi
ksi to psi	1000 psi	psi to ksi
ksi to bar	68.94757293 bar	bar to ksi
ksi to millimeter of mercury	51714.9252 mmHg	millimeter of mercury to ksi
ksi to inch of water	27679.90471 inH₂O	inch of water to ksi
ksi to atmosphere	68.04596391 atm	atmosphere to ksi
ksi to megapascal	6.894757293 MPa	megapascal to ksi
ksi to gigapascal	0.006894757293 GPa	gigapascal to ksi
ksi to newton per square millimetre	6.894757293 N/mm²	newton per square millimetre to ksi
ksi to kilogram-force per square millimetre	0.7030695796 kgf/mm²	kilogram-force per square millimetre to ksi
ksi to millibar	68947.57293 mbar	millibar to ksi
ksi to torr	51714.93257 Torr	torr to ksi
ksi to millimeter of water	703069.5796 mmH₂O	millimeter of water to ksi
ksi to centimeter of water	70306.95796 cmH₂O	centimeter of water to ksi
ksi to inch of mercury	2036.020677 inHg	inch of mercury to ksi
ksi to decibar	689.4757293 dbar	decibar to ksi
ksi to inch of water (60 °F)	27707.5924 inH₂O (60 °F)	inch of water (60 °F) to ksi
ksi to barye	68947572.93 Ba	barye to ksi

Open the Pressure Converter to convert any value between all units.

Sources

Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kip per square inch (ksi)".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.

Cite this page

APA

Scientific Converters. (2026, October 15). ksi. Retrieved October 25, 2026, from https://scientificconverters.com/units/ksi/

IEEE

Scientific Converters, "ksi," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/ksi/