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Vacuum

PatoinHg

Convert pascals (vacuum) (Pa) to inches of mercury (vacuum) (inHg).

Factor1 Pa = 0.0002952998 inHg

Converter

Pa

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

Result
2.953inHg

Rendered to 6 significant figures.

Formula

Formula
inHg = Pa × 0.0002952998

Multiply any value in pascals (vacuum) by 0.0002952998 to obtain the value in inches of mercury (vacuum).

Worked example

Convert 10000 Pa to inHg.

  1. 01Start with 10000 Pa.
  2. 02Multiply by the conversion factor: 10000 × 0.0002952998 = 2.953 inHg.
Result10000 Pa = 2.953 inHg

Conversion table

PainHg
10.0002953
20.0005906
50.0014765
100.002953
200.005906
500.014765
1000.02953
2000.05906
5000.14765
10000.2953

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from Pa to inHg?
1 Pa equals 0.0002952998 inHg. To convert, multiply the value in pascals (vacuum) by 0.0002952998.
How do I convert 1 Pa to inHg?
1 Pa = 0.0002953 inHg. For any value, multiply by 0.0002952998.
How do I convert inHg back to Pa?
Divide by the same factor — or equivalently, multiply by 3386.389. So 1 inHg = 3386.39 Pa.
When would I need to convert pascal (vacuum) to inch of mercury (vacuum)?
Vacuum-pressure conversions between Pa and inHg are common in vacuum-chamber instrumentation, pump-down endpoint specification, semiconductor and deposition process work, freeze-drying, electron-microscopy column pressure, vacuum metallurgy and HVAC / refrigeration service. Torr, mmHg and inHg dominate manometric vacuum gauges; mbar is standard on European instruments; micron Hg and mTorr cover high-vacuum work; Pa and kPa are the SI references. This category is vacuum / instrumentation intent — dimensionally the same as pressure, but kept separate so process-pressure searches and vacuum searches stay on the right page.
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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