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Vacuum

mPatoinHg

Convert millipascals (vacuum) (mPa) to inches of mercury (vacuum) (inHg).

Factor1 mPa = 2.952998e-7 inHg

Converter

mPa

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

Result
0.2953inHg

Rendered to 6 significant figures.

Formula

Formula
inHg = mPa × 2.952998e-7

Multiply any value in millipascals (vacuum) by 2.952998e-7 to obtain the value in inches of mercury (vacuum).

Worked example

Convert 1.00000e+6 mPa to inHg.

  1. 01Start with 1.00000e+6 mPa.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 2.952998e-7 = 0.2953 inHg.
Result1.00000e+6 mPa = 0.2953 inHg

Conversion table

mPainHg
12.953e-7
25.906e-7
51.4765e-6
102.953e-6
205.906e-6
501.4765e-5
1002.953e-5
2005.906e-5
5000.00014765
10000.0002953

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mPa to inHg?
1 mPa equals 2.952998e-7 inHg. To convert, multiply the value in millipascals (vacuum) by 2.952998e-7.
How do I convert 1 mPa to inHg?
1 mPa = 2.953e-7 inHg. For any value, multiply by 2.952998e-7.
How do I convert inHg back to mPa?
Divide by the same factor — or equivalently, multiply by 3386389. So 1 inHg = 3.38639e+6 mPa.
When would I need to convert millipascal (vacuum) to inch of mercury (vacuum)?
Vacuum-pressure conversions between mPa 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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