Stress
ksitoN/mm²
Convert kilopounds-force per square inch (stress) (ksi) to newtons per square millimetre (stress) (N/mm²).
Factor1 ksi = 6.894757 N/mm²
Converter
ksi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
N/mm²
Rendered to 6 significant figures.
Formula
Formula
N/mm² = ksi × 6.894757
Multiply any value in kilopounds-force per square inch (stress) by 6.894757 to obtain the value in newtons per square millimetre (stress).
Worked example
Convert 1 ksi to N/mm².
- 01Start with 1 ksi.
- 02Multiply by the conversion factor: 1 × 6.894757 = 6.89476 N/mm².
Result1 ksi = 6.89476 N/mm²
Conversion table
| ksi | N/mm² |
|---|---|
| 1 | 6.8948 |
| 2 | 13.79 |
| 5 | 34.474 |
| 10 | 68.948 |
| 20 | 137.9 |
| 50 | 344.74 |
| 100 | 689.48 |
| 200 | 1379 |
| 500 | 3447.4 |
| 1000 | 6894.8 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ksi to N/mm²?
1 ksi equals 6.894757 N/mm². To convert, multiply the value in kilopounds-force per square inch (stress) by 6.894757.
How do I convert 1 ksi to N/mm²?
1 ksi = 6.89476 N/mm². For any value, multiply by 6.894757.
How do I convert N/mm² back to ksi?
Divide by the same factor — or equivalently, multiply by 0.1450377. So 1 N/mm² = 0.145038 ksi.
When would I need to convert kilopound-force per square inch (stress) to newton per square millimetre (stress)?
Stress conversions between ksi and N/mm² are routine in mechanics-of-materials work: yield, ultimate and allowable-stress specification, Young's-modulus tables and structural-design code calculations. MPa and N/mm² dominate ISO and European datasheets, psi and ksi dominate US structural codes, and kgf/cm² and kgf/mm² appear in legacy JIS and heavy-engineering documentation. Stress is the same physical dimension as pressure but a different engineering quantity — this category is mechanics-of-materials, not process pressure.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).
Related conversions
- N/mm² → ksinewton per square millimetre (stress) → kilopound-force per square inch (stress)
- Pa → ksipascal (stress) → kilopound-force per square inch (stress)
- ksi → Pakilopound-force per square inch (stress) → pascal (stress)
- Pa → N/mm²pascal (stress) → newton per square millimetre (stress)
- N/mm² → Panewton per square millimetre (stress) → pascal (stress)
- MPa → ksimegapascal (stress) → kilopound-force per square inch (stress)