Convert ksi to Newtons per Square Millimetre (ksi to N/mm2)
1 ksi = 6.894757293 newtons per square millimetre (N/mm²). 1 N/mm² = 0.1450377377 ksi. Example: 15 ksi = 15 × 6.894757293 = 103.4213594 N/mm².
Also searched as ksi to N/mm2, ksi in N/mm2, ksi into newtons per square millimetre, ksi in newtons per square millimetre, ksi into newton per square millimetre, ksi to newton per square millimetre, ksi to newtons per square millimetre converter, ksi to newtons per square millimeter and how many newtons per square millimetre in a ksi.
1 ksi = 6.894757293 N/mm²
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk ksi to newton per square millimetre converter to paste a column from Excel.
How to Convert ksi to Newton per Square Millimetre
- 1 ksi = 6.894757293 N/mm²
- 1 N/mm² = 0.1450377377 ksi
- Example: convert 15 ksi to N/mm²: 15 ksi = 15 × 6.894757293 N/mm² = 103.4213594 N/mm²
Formula
N/mm² = ksi × 6.894757293168
Derivation from SI units:
- 1 ksi = 1000 psi = 1 kip/in² = 6.894757293168 MPa
- 1 N/mm² = 1 N ÷ 10⁻⁶ m² = 10⁶ Pa = 1 MPa
- 1 ksi = 6894757.293168 Pa ÷ 1000000 Pa per N/mm² = 6.894757293168 N/mm²
Both units are defined exactly, so the factor is exact. ksi definition: ksi; Newton per Square Millimetre definition: newton per square millimetre.
Worked examples
- A reading of 20 ksi converts to 137.8951459 N/mm².
20 ksi × 6.894757293 = 137.8951459 N/mm² - A value of 65 ksi is 448.1592241 N/mm².
65 ksi × 6.894757293 = 448.1592241 N/mm²
ksi to Newton per Square Millimetre conversion table
| ksi | Newtons per Square Millimetre (N/mm²) |
|---|---|
| 1 ksi | 6.894757293 N/mm² |
| 3 ksi | 20.68427188 N/mm² |
| 4 ksi | 27.57902917 N/mm² |
| 5 ksi | 34.47378647 N/mm² |
| 10 ksi | 68.94757293 N/mm² |
| 20 ksi | 137.8951459 N/mm² |
| 30 ksi | 206.8427188 N/mm² |
| 36 ksi | 248.2112626 N/mm² |
| 50 ksi | 344.7378647 N/mm² |
| 60 ksi | 413.6854376 N/mm² |
| 65 ksi | 448.1592241 N/mm² |
| 70 ksi | 482.6330105 N/mm² |
| 100 ksi | 689.4757293 N/mm² |
| 150 ksi | 1034.213594 N/mm² |
| 200 ksi | 1378.951459 N/mm² |
Where it's used
ksi are used for yield and tensile strength in ASTM and ASME material specifications, while newtons per square millimetre appear in steel yield and tensile strength (S355: 355 N/mm²). 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 newton per square millimetre | 6.894757293 N/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 kilogram-force per square millimetre | 0.7030695796 kgf/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 newtons per square millimetre are in 1 ksi?
1 ksi = 6.894757293 N/mm².
How do I convert ksi to newtons per square millimetre?
Multiply the value in ksi by 6.894757293. For example, 15 ksi × 6.894757293 = 103.4213594 N/mm².
Is the ksi to N/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)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4, coherent derived units with special names.
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 Newtons per Square Millimetre (ksi to N/mm2). Retrieved October 25, 2026, from https://scientificconverters.com/pressure/ksi-to-newton-per-square-millimeter/
IEEE
Scientific Converters, "Convert ksi to Newtons per Square Millimetre (ksi to N/mm2)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/ksi-to-newton-per-square-millimeter/