Vacuum
mTorrtoTorr
Convert millitorr (mTorr) to torr (vacuum) (Torr).
Factor1 mTorr = 0.001 Torr
Converter
mTorr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Torr
Rendered to 6 significant figures.
Formula
Formula
Torr = mTorr × 0.001
Multiply any value in millitorr by 0.001 to obtain the value in torr (vacuum).
Worked example
Convert 1000 mTorr to Torr.
- 01Start with 1000 mTorr.
- 02Multiply by the conversion factor: 1000 × 0.001 = 1 Torr.
Result1000 mTorr = 1 Torr
Conversion table
| mTorr | Torr |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mTorr to Torr?
1 mTorr equals 0.001 Torr. To convert, multiply the value in millitorr by 0.001.
How do I convert 1 mTorr to Torr?
1 mTorr = 0.001 Torr. For any value, multiply by 0.001.
How do I convert Torr back to mTorr?
Divide by the same factor — or equivalently, multiply by 1000. So 1 Torr = 1000 mTorr.
When would I need to convert millitorr to torr (vacuum)?
Vacuum-pressure conversions between mTorr 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).