Vacuum
TorrtoinHg
Convert torr (vacuum) (Torr) to inches of mercury (vacuum) (inHg).
Factor1 Torr = 0.03937007 inHg
Converter
Torr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
inHg
Rendered to 6 significant figures.
Formula
Formula
inHg = Torr × 0.03937007
Multiply any value in torr (vacuum) by 0.03937007 to obtain the value in inches of mercury (vacuum).
Worked example
Convert 760 Torr to inHg.
- 01Start with 760 Torr.
- 02Multiply by the conversion factor: 760 × 0.03937007 = 29.9213 inHg.
Result760 Torr = 29.9213 inHg
Conversion table
| Torr | inHg |
|---|---|
| 1 | 0.03937 |
| 2 | 0.07874 |
| 5 | 0.19685 |
| 10 | 0.3937 |
| 20 | 0.7874 |
| 50 | 1.9685 |
| 100 | 3.937 |
| 200 | 7.874 |
| 500 | 19.685 |
| 1000 | 39.37 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Torr to inHg?
1 Torr equals 0.03937007 inHg. To convert, multiply the value in torr (vacuum) by 0.03937007.
How do I convert 1 Torr to inHg?
1 Torr = 0.0393701 inHg. For any value, multiply by 0.03937007.
How do I convert inHg back to Torr?
Divide by the same factor — or equivalently, multiply by 25.40001. So 1 inHg = 25.4 Torr.
When would I need to convert torr (vacuum) to inch of mercury (vacuum)?
Vacuum-pressure conversions between Torr and inHg 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).