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Stress

N/mm²toMPa

Convert newtons per square millimetre (stress) (N/mm²) to megapascals (stress) (MPa).

Factor1 N/mm² = 1 MPa

Converter

N/mm²

Accepts numbers or expressions, e.g. 150 + 14.7

Result
100MPa

Rendered to 6 significant figures.

Formula

Formula
MPa = N/mm² × 1

Multiply any value in newtons per square millimetre (stress) by 1 to obtain the value in megapascals (stress).

Worked example

Convert 100 N/mm² to MPa.

  1. 01Start with 100 N/mm².
  2. 02Multiply by the conversion factor: 100 × 1 = 100 MPa.
Result100 N/mm² = 100 MPa

Conversion table

N/mm²MPa
11
22
55
1010
2020
5050
100100
200200
500500
10001000

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from N/mm² to MPa?
1 N/mm² equals 1 MPa. To convert, multiply the value in newtons per square millimetre (stress) by 1.
How do I convert 1 N/mm² to MPa?
1 N/mm² = 1 MPa. For any value, multiply by 1.
How do I convert MPa back to N/mm²?
Divide by the same factor — or equivalently, multiply by 1. So 1 MPa = 1 N/mm².
When would I need to convert newton per square millimetre (stress) to megapascal (stress)?
Stress conversions between N/mm² and MPa 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).

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