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Vacuum

µm HgtoTorr

Convert microns of mercury (µm Hg) to torr (vacuum) (Torr).

Factor1 µm Hg = 0.001 Torr

Converter

µm Hg

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

Result
1Torr

Rendered to 6 significant figures.

Formula

Formula
Torr = µm Hg × 0.001

Multiply any value in microns of mercury by 0.001 to obtain the value in torr (vacuum).

Worked example

Convert 1000 µm Hg to Torr.

  1. 01Start with 1000 µm Hg.
  2. 02Multiply by the conversion factor: 1000 × 0.001 = 1 Torr.
Result1000 µm Hg = 1 Torr

Conversion table

µm HgTorr
10.001
20.002
50.005
100.01
200.02
500.05
1000.1
2000.2
5000.5
10001

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from µm Hg to Torr?
1 µm Hg equals 0.001 Torr. To convert, multiply the value in microns of mercury by 0.001.
How do I convert 1 µm Hg to Torr?
1 µm Hg = 0.001 Torr. For any value, multiply by 0.001.
How do I convert Torr back to µm Hg?
Divide by the same factor — or equivalently, multiply by 1000. So 1 Torr = 1000 µm Hg.
When would I need to convert micron of mercury to torr (vacuum)?
Vacuum-pressure conversions between µm Hg and Torr 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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