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Vacuum

mbartommHg

Convert millibars (vacuum) (mbar) to millimetres of mercury (vacuum) (mmHg).

Factor1 mbar = 0.7500616 mmHg

Converter

mbar

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

Result
750.062mmHg

Rendered to 6 significant figures.

Formula

Formula
mmHg = mbar × 0.7500616

Multiply any value in millibars (vacuum) by 0.7500616 to obtain the value in millimetres of mercury (vacuum).

Worked example

Convert 1000 mbar to mmHg.

  1. 01Start with 1000 mbar.
  2. 02Multiply by the conversion factor: 1000 × 0.7500616 = 750.062 mmHg.
Result1000 mbar = 750.062 mmHg

Conversion table

mbarmmHg
10.75006
21.5001
53.7503
107.5006
2015.001
5037.503
10075.006
200150.01
500375.03
1000750.06

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mbar to mmHg?
1 mbar equals 0.7500616 mmHg. To convert, multiply the value in millibars (vacuum) by 0.7500616.
How do I convert 1 mbar to mmHg?
1 mbar = 0.750062 mmHg. For any value, multiply by 0.7500616.
How do I convert mmHg back to mbar?
Divide by the same factor — or equivalently, multiply by 1.333224. So 1 mmHg = 1.33322 mbar.
When would I need to convert millibar (vacuum) to millimetre of mercury (vacuum)?
Vacuum-pressure conversions between mbar and mmHg 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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