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Stress

psitoMpsi

Convert pounds-force per square inch (stress) (psi) to megapounds-force per square inch (stress) (Mpsi).

Factor1 psi = 1e-6 Mpsi

Converter

psi

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

Result
1Mpsi

Rendered to 6 significant figures.

Formula

Formula
Mpsi = psi × 1e-6

Multiply any value in pounds-force per square inch (stress) by 1e-6 to obtain the value in megapounds-force per square inch (stress).

Worked example

Convert 1.00000e+6 psi to Mpsi.

  1. 01Start with 1.00000e+6 psi.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 1e-6 = 1 Mpsi.
Result1.00000e+6 psi = 1 Mpsi

Conversion table

psiMpsi
11e-6
22e-6
55e-6
101e-5
202e-5
505e-5
1000.0001
2000.0002
5000.0005
10000.001

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from psi to Mpsi?
1 psi equals 1e-6 Mpsi. To convert, multiply the value in pounds-force per square inch (stress) by 1e-6.
How do I convert 1 psi to Mpsi?
1 psi = 1e-6 Mpsi. For any value, multiply by 1e-6.
How do I convert Mpsi back to psi?
Divide by the same factor — or equivalently, multiply by 1000000. So 1 Mpsi = 1.00000e+6 psi.
When would I need to convert pound-force per square inch (stress) to megapound-force per square inch (stress)?
Stress conversions between psi and Mpsi 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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