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Stress

mmHgtokPa

Convert millimetres of mercury (stress) (mmHg) to kilopascals (stress) (kPa).

Factor1 mmHg = 0.1333224 kPa

Converter

mmHg

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

Result
1.33322kPa

Rendered to 6 significant figures.

Formula

Formula
kPa = mmHg × 0.1333224

Multiply any value in millimetres of mercury (stress) by 0.1333224 to obtain the value in kilopascals (stress).

Worked example

Convert 10 mmHg to kPa.

  1. 01Start with 10 mmHg.
  2. 02Multiply by the conversion factor: 10 × 0.1333224 = 1.33322 kPa.
Result10 mmHg = 1.33322 kPa

Conversion table

mmHgkPa
10.13332
20.26664
50.66661
101.3332
202.6664
506.6661
10013.332
20026.664
50066.661
1000133.32

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mmHg to kPa?
1 mmHg equals 0.1333224 kPa. To convert, multiply the value in millimetres of mercury (stress) by 0.1333224.
How do I convert 1 mmHg to kPa?
1 mmHg = 0.133322 kPa. For any value, multiply by 0.1333224.
How do I convert kPa back to mmHg?
Divide by the same factor — or equivalently, multiply by 7.500616. So 1 kPa = 7.50062 mmHg.
When would I need to convert millimetre of mercury (stress) to kilopascal (stress)?
Stress conversions between mmHg and kPa 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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