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Stress

mmHgtopsi

Convert millimetres of mercury (stress) (mmHg) to pounds-force per square inch (stress) (psi).

Factor1 mmHg = 0.01933678 psi

Converter

mmHg

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

Result
1.93368psi

Rendered to 6 significant figures.

Formula

Formula
psi = mmHg × 0.01933678

Multiply any value in millimetres of mercury (stress) by 0.01933678 to obtain the value in pounds-force per square inch (stress).

Worked example

Convert 100 mmHg to psi.

  1. 01Start with 100 mmHg.
  2. 02Multiply by the conversion factor: 100 × 0.01933678 = 1.93368 psi.
Result100 mmHg = 1.93368 psi

Conversion table

mmHgpsi
10.019337
20.038674
50.096684
100.19337
200.38674
500.96684
1001.9337
2003.8674
5009.6684
100019.337

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mmHg to psi?
1 mmHg equals 0.01933678 psi. To convert, multiply the value in millimetres of mercury (stress) by 0.01933678.
How do I convert 1 mmHg to psi?
1 mmHg = 0.0193368 psi. For any value, multiply by 0.01933678.
How do I convert psi back to mmHg?
Divide by the same factor — or equivalently, multiply by 51.71493. So 1 psi = 51.7149 mmHg.
When would I need to convert millimetre of mercury (stress) to pound-force per square inch (stress)?
Stress conversions between mmHg and psi 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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