Kilogram-force per Square Millimetre (kgf/mm²)

The kilogram-force per square millimetre is the weight of one kilogram (9.80665 N) on one square millimetre, exactly 9.80665 MPa. Older Japanese, Chinese and European material standards give tensile strength in kgf/mm².

Symbol: kgf/mm² (ASCII: kgf/mm2)

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

SI relation: 1 kgf/mm² = 9806650 Pa (exact)

Derivation: 1 kgf/mm² = 9.80665 N ÷ 1 mm² = 9.80665 MPa (exact)

Exact: yes, by definition

Typical uses

Tensile strength in older JIS and GB steel standards
Wire and spring strength tables
Vickers and Brinell hardness, which are defined in kgf/mm²

Convert kilograms-force per square millimetre to other units

1 kgf/mm² in other pressure units
Conversion	1 kgf/mm² equals	Reverse
kilogram-force per square millimetre to pascal	9806650 Pa	pascal to kilogram-force per square millimetre
kilogram-force per square millimetre to kilopascal	9806.65 kPa	kilopascal to kilogram-force per square millimetre
kilogram-force per square millimetre to ksi	1.422334331 ksi	ksi to kilogram-force per square millimetre
kilogram-force per square millimetre to kilogram-force per square centimetre	100 kgf/cm²	kilogram-force per square centimetre to kilogram-force per square millimetre
kilogram-force per square millimetre to psi	1422.334331 psi	psi to kilogram-force per square millimetre
kilogram-force per square millimetre to bar	98.0665 bar	bar to kilogram-force per square millimetre
kilogram-force per square millimetre to millimeter of mercury	73555.91353 mmHg	millimeter of mercury to kilogram-force per square millimetre
kilogram-force per square millimetre to inch of water	39370.07874 inH₂O	inch of water to kilogram-force per square millimetre
kilogram-force per square millimetre to atmosphere	96.78411054 atm	atmosphere to kilogram-force per square millimetre
kilogram-force per square millimetre to megapascal	9.80665 MPa	megapascal to kilogram-force per square millimetre
kilogram-force per square millimetre to gigapascal	0.00980665 GPa	gigapascal to kilogram-force per square millimetre
kilogram-force per square millimetre to newton per square millimetre	9.80665 N/mm²	newton per square millimetre to kilogram-force per square millimetre
kilogram-force per square millimetre to millibar	98066.5 mbar	millibar to kilogram-force per square millimetre
kilogram-force per square millimetre to torr	73555.92401 Torr	torr to kilogram-force per square millimetre
kilogram-force per square millimetre to millimeter of water	1000000 mmH₂O	millimeter of water to kilogram-force per square millimetre
kilogram-force per square millimetre to centimeter of water	100000 cmH₂O	centimeter of water to kilogram-force per square millimetre
kilogram-force per square millimetre to inch of mercury	2895.902107 inHg	inch of mercury to kilogram-force per square millimetre
kilogram-force per square millimetre to decibar	980.665 dbar	decibar to kilogram-force per square millimetre
kilogram-force per square millimetre to inch of water (60 °F)	39409.45989 inH₂O (60 °F)	inch of water (60 °F) to kilogram-force per square millimetre
kilogram-force per square millimetre to barye	98066500 Ba	barye to kilogram-force per square millimetre

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, "kilogram-force per square millimeter".

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). Kilogram-force per Square Millimetre (kgf/mm²). Retrieved October 25, 2026, from https://scientificconverters.com/units/kilogram-force-per-square-millimeter/

IEEE

Scientific Converters, "Kilogram-force per Square Millimetre (kgf/mm²)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/kilogram-force-per-square-millimeter/