Convert ksi to Kilograms-force per Square Millimetre
1 ksi = 0.7030695796 kilograms-force per square millimetre (kgf/mm²). 1 kgf/mm² = 1.422334331 ksi. Example: 15 ksi = 15 × 0.7030695796 = 10.54604369 kgf/mm².
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1 ksi = 0.7030695796 kgf/mm²
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk ksi to kilogram-force per square millimetre converter to paste a column from Excel.
How to Convert ksi to Kilogram-force per Square Millimetre
- 1 ksi = 0.7030695796 kgf/mm²
- 1 kgf/mm² = 1.422334331 ksi
- Example: convert 15 ksi to kgf/mm²: 15 ksi = 15 × 0.7030695796 kgf/mm² = 10.54604369 kgf/mm²
Formula
kgf/mm² = ksi × 0.7030695796392
or kgf/mm² = ksi ÷ 1.422334330712
Derivation from SI units:
- 1 ksi = 1000 psi = 1 kip/in² = 6.894757293168 MPa
- 1 kgf/mm² = 9.80665 N ÷ 1 mm² = 9.80665 MPa (exact)
- 1 ksi = 6894757.293168 Pa ÷ 9806650 Pa per kgf/mm² = 0.7030695796392 kgf/mm²
Both units are defined exactly, so the factor is exact. ksi definition: ksi; Kilogram-force per Square Millimetre definition: kilogram-force per square millimetre.
Worked examples
- A reading of 20 ksi converts to 14.06139159 kgf/mm².
20 ksi × 0.7030695796 = 14.06139159 kgf/mm² - A value of 65 ksi is 45.69952268 kgf/mm².
65 ksi × 0.7030695796 = 45.69952268 kgf/mm²
ksi to Kilogram-force per Square Millimetre conversion table
| ksi | Kilograms-force per Square Millimetre (kgf/mm²) |
|---|---|
| 1 ksi | 0.7030695796 kgf/mm² |
| 3 ksi | 2.109208739 kgf/mm² |
| 4 ksi | 2.812278319 kgf/mm² |
| 5 ksi | 3.515347898 kgf/mm² |
| 10 ksi | 7.030695796 kgf/mm² |
| 20 ksi | 14.06139159 kgf/mm² |
| 30 ksi | 21.09208739 kgf/mm² |
| 36 ksi | 25.31050487 kgf/mm² |
| 50 ksi | 35.15347898 kgf/mm² |
| 60 ksi | 42.18417478 kgf/mm² |
| 65 ksi | 45.69952268 kgf/mm² |
| 70 ksi | 49.21487057 kgf/mm² |
| 100 ksi | 70.30695796 kgf/mm² |
| 150 ksi | 105.4604369 kgf/mm² |
| 200 ksi | 140.6139159 kgf/mm² |
Where it's used
ksi are used for yield and tensile strength in ASTM and ASME material specifications, while kilograms-force per square millimetre appear in tensile strength in older JIS and GB steel standards. Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.
ksi to other pressure units
| Conversion | 1 ksi equals |
|---|---|
| ksi to kilogram-force per square millimetre | 0.7030695796 kgf/mm² |
| ksi to pascal | 6894757.293 Pa |
| ksi to kilopascal | 6894.757293 kPa |
| ksi to kilogram-force per square centimetre | 70.30695796 kgf/cm² |
| ksi to psi | 1000 psi |
| ksi to bar | 68.94757293 bar |
| ksi to millimeter of mercury | 51714.9252 mmHg |
| ksi to inch of water | 27679.90471 inH₂O |
Show 12 more units
| ksi to atmosphere | 68.04596391 atm |
|---|---|
| ksi to megapascal | 6.894757293 MPa |
| ksi to gigapascal | 0.006894757293 GPa |
| ksi to newton per square millimetre | 6.894757293 N/mm² |
| ksi to millibar | 68947.57293 mbar |
| ksi to torr | 51714.93257 Torr |
| ksi to millimeter of water | 703069.5796 mmH₂O |
| ksi to centimeter of water | 70306.95796 cmH₂O |
| ksi to inch of mercury | 2036.020677 inHg |
| ksi to decibar | 689.4757293 dbar |
| ksi to inch of water (60 °F) | 27707.5924 inH₂O (60 °F) |
| ksi to barye | 68947572.93 Ba |
Frequently asked questions
How many kilograms-force per square millimetre are in 1 ksi?
1 ksi = 0.7030695796 kgf/mm².
How do I convert ksi to kilograms-force per square millimetre?
Multiply the value in ksi by 0.7030695796, or divide it by 1.422334331. For example, 15 ksi × 0.7030695796 = 10.54604369 kgf/mm².
Is the ksi to kgf/mm² conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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)".
- 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: . 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). Convert ksi to Kilograms-force per Square Millimetre. Retrieved October 25, 2026, from https://scientificconverters.com/pressure/ksi-to-kilogram-force-per-square-millimeter/
IEEE
Scientific Converters, "Convert ksi to Kilograms-force per Square Millimetre," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/ksi-to-kilogram-force-per-square-millimeter/