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Vacuum

µm Hgtoµbar

Convert microns of mercury (µm Hg) to microbar (vacuum) (µbar).

Factor1 µm Hg = 1.333224 µbar

Converter

µm Hg

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

Result
1.33322µbar

Rendered to 6 significant figures.

Formula

Formula
µbar = µm Hg × 1.333224

Multiply any value in microns of mercury by 1.333224 to obtain the value in microbar (vacuum).

Worked example

Convert 1 µm Hg to µbar.

  1. 01Start with 1 µm Hg.
  2. 02Multiply by the conversion factor: 1 × 1.333224 = 1.33322 µbar.
Result1 µm Hg = 1.33322 µbar

Conversion table

µm Hgµbar
11.3332
22.6664
56.6661
1013.332
2026.664
5066.661
100133.32
200266.64
500666.61
10001333.2

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from µm Hg to µbar?
1 µm Hg equals 1.333224 µbar. To convert, multiply the value in microns of mercury by 1.333224.
How do I convert 1 µm Hg to µbar?
1 µm Hg = 1.33322 µbar. For any value, multiply by 1.333224.
How do I convert µbar back to µm Hg?
Divide by the same factor — or equivalently, multiply by 0.7500617. So 1 µbar = 0.750062 µm Hg.
When would I need to convert micron of mercury to microbar (vacuum)?
Vacuum-pressure conversions between µm Hg 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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