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Vacuum

mTorrtobar

Convert millitorr (mTorr) to bar (vacuum) (bar).

Factor1 mTorr = 1.333224e-6 bar

Converter

mTorr

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

Result
1.33322bar

Rendered to 6 significant figures.

Formula

Formula
bar = mTorr × 1.333224e-6

Multiply any value in millitorr by 1.333224e-6 to obtain the value in bar (vacuum).

Worked example

Convert 1.00000e+6 mTorr to bar.

  1. 01Start with 1.00000e+6 mTorr.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 1.333224e-6 = 1.33322 bar.
Result1.00000e+6 mTorr = 1.33322 bar

Conversion table

mTorrbar
11.3332e-6
22.6664e-6
56.6661e-6
101.3332e-5
202.6664e-5
506.6661e-5
1000.00013332
2000.00026664
5000.00066661
10000.0013332

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mTorr to bar?
1 mTorr equals 1.333224e-6 bar. To convert, multiply the value in millitorr by 1.333224e-6.
How do I convert 1 mTorr to bar?
1 mTorr = 1.33322e-6 bar. For any value, multiply by 1.333224e-6.
How do I convert bar back to mTorr?
Divide by the same factor — or equivalently, multiply by 750061.7. So 1 bar = 750062 mTorr.
When would I need to convert millitorr to bar (vacuum)?
Vacuum-pressure conversions between mTorr 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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