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Vacuum

µm HgtonTorr

Convert microns of mercury (µm Hg) to nanotorr (vacuum) (nTorr).

Factor1 µm Hg = 1000000 nTorr

Converter

µm Hg

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

Result
1.00000e+6nTorr

Rendered to 6 significant figures.

Formula

Formula
nTorr = µm Hg × 1000000

Multiply any value in microns of mercury by 1000000 to obtain the value in nanotorr (vacuum).

Worked example

Convert 1 µm Hg to nTorr.

  1. 01Start with 1 µm Hg.
  2. 02Multiply by the conversion factor: 1 × 1000000 = 1.00000e+6 nTorr.
Result1 µm Hg = 1.00000e+6 nTorr

Conversion table

µm HgnTorr
11.0000e+6
22.0000e+6
55.0000e+6
101e+7
202e+7
505e+7
1001e+8
2002e+8
5005e+8
10001e+9

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from µm Hg to nTorr?
1 µm Hg equals 1000000 nTorr. To convert, multiply the value in microns of mercury by 1000000.
How do I convert 1 µm Hg to nTorr?
1 µm Hg = 1.00000e+6 nTorr. For any value, multiply by 1000000.
How do I convert nTorr back to µm Hg?
Divide by the same factor — or equivalently, multiply by 1e-6. So 1 nTorr = 1e-6 µm Hg.
When would I need to convert micron of mercury to nanotorr (vacuum)?
Vacuum-pressure conversions between µm Hg and nTorr 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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