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Vacuum

inHgtobar

Convert inches of mercury (vacuum) (inHg) to bar (vacuum) (bar).

Factor1 inHg = 0.03386389 bar

Converter

inHg

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

Result
1.01592bar

Rendered to 6 significant figures.

Formula

Formula
bar = inHg × 0.03386389

Multiply any value in inches of mercury (vacuum) by 0.03386389 to obtain the value in bar (vacuum).

Worked example

Convert 30 inHg to bar.

  1. 01Start with 30 inHg.
  2. 02Multiply by the conversion factor: 30 × 0.03386389 = 1.01592 bar.
Result30 inHg = 1.01592 bar

Conversion table

inHgbar
10.033864
20.067728
50.16932
100.33864
200.67728
501.6932
1003.3864
2006.7728
50016.932
100033.864

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from inHg to bar?
1 inHg equals 0.03386389 bar. To convert, multiply the value in inches of mercury (vacuum) by 0.03386389.
How do I convert 1 inHg to bar?
1 inHg = 0.0338639 bar. For any value, multiply by 0.03386389.
How do I convert bar back to inHg?
Divide by the same factor — or equivalently, multiply by 29.52998. So 1 bar = 29.53 inHg.
When would I need to convert inch of mercury (vacuum) to bar (vacuum)?
Vacuum-pressure conversions between inHg and bar 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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