▸ processconvert
Vacuum

mbartoinHg

Convert millibars (vacuum) (mbar) to inches of mercury (vacuum) (inHg).

Factor1 mbar = 0.02952998 inHg

Converter

mbar

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

Result
29.53inHg

Rendered to 6 significant figures.

Formula

Formula
inHg = mbar × 0.02952998

Multiply any value in millibars (vacuum) by 0.02952998 to obtain the value in inches of mercury (vacuum).

Worked example

Convert 1000 mbar to inHg.

  1. 01Start with 1000 mbar.
  2. 02Multiply by the conversion factor: 1000 × 0.02952998 = 29.53 inHg.
Result1000 mbar = 29.53 inHg

Conversion table

mbarinHg
10.02953
20.05906
50.14765
100.2953
200.5906
501.4765
1002.953
2005.906
50014.765
100029.53

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mbar to inHg?
1 mbar equals 0.02952998 inHg. To convert, multiply the value in millibars (vacuum) by 0.02952998.
How do I convert 1 mbar to inHg?
1 mbar = 0.02953 inHg. For any value, multiply by 0.02952998.
How do I convert inHg back to mbar?
Divide by the same factor — or equivalently, multiply by 33.86389. So 1 inHg = 33.8639 mbar.
When would I need to convert millibar (vacuum) to inch of mercury (vacuum)?
Vacuum-pressure conversions between mbar 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).

Related conversions