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Vacuum

mmHgtoµbar

Convert millimetres of mercury (vacuum) (mmHg) to microbar (vacuum) (µbar).

Factor1 mmHg = 1333.224 µbar

Converter

mmHg

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

Result
1333.22µbar

Rendered to 6 significant figures.

Formula

Formula
µbar = mmHg × 1333.224

Multiply any value in millimetres of mercury (vacuum) by 1333.224 to obtain the value in microbar (vacuum).

Worked example

Convert 1 mmHg to µbar.

  1. 01Start with 1 mmHg.
  2. 02Multiply by the conversion factor: 1 × 1333.224 = 1333.22 µbar.
Result1 mmHg = 1333.22 µbar

Conversion table

mmHgµbar
11333.2
22666.4
56666.1
1013332
2026664
5066661
1001.3332e+5
2002.6664e+5
5006.6661e+5
10001.3332e+6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mmHg to µbar?
1 mmHg equals 1333.224 µbar. To convert, multiply the value in millimetres of mercury (vacuum) by 1333.224.
How do I convert 1 mmHg to µbar?
1 mmHg = 1333.22 µbar. For any value, multiply by 1333.224.
How do I convert µbar back to mmHg?
Divide by the same factor — or equivalently, multiply by 0.0007500616. So 1 µbar = 0.000750062 mmHg.
When would I need to convert millimetre of mercury (vacuum) to microbar (vacuum)?
Vacuum-pressure conversions between mmHg and µbar 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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