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Vacuum

mmHgtoTorr

Convert millimetres of mercury (vacuum) (mmHg) to torr (vacuum) (Torr).

Factor1 mmHg = 1 Torr

Converter

mmHg

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

Result
760Torr

Rendered to 6 significant figures.

Formula

Formula
Torr = mmHg × 1

Multiply any value in millimetres of mercury (vacuum) by 1 to obtain the value in torr (vacuum).

Worked example

Convert 760 mmHg to Torr.

  1. 01Start with 760 mmHg.
  2. 02Multiply by the conversion factor: 760 × 1 = 760 Torr.
Result760 mmHg = 760 Torr

Conversion table

mmHgTorr
11
22
55
1010
2020
5050
100100
200200
500500
10001000

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mmHg to Torr?
1 mmHg equals 1 Torr. To convert, multiply the value in millimetres of mercury (vacuum) by 1.
How do I convert 1 mmHg to Torr?
1 mmHg = 1 Torr. For any value, multiply by 1.
How do I convert Torr back to mmHg?
Divide by the same factor — or equivalently, multiply by 0.9999999. So 1 Torr = 1 mmHg.
When would I need to convert millimetre of mercury (vacuum) to torr (vacuum)?
Vacuum-pressure conversions between mmHg 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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