Vacuum
nTorrtomTorr
Convert nanotorr (vacuum) (nTorr) to millitorr (mTorr).
Factor1 nTorr = 1e-6 mTorr
Converter
nTorr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mTorr
Rendered to 6 significant figures.
Formula
Formula
mTorr = nTorr × 1e-6
Multiply any value in nanotorr (vacuum) by 1e-6 to obtain the value in millitorr.
Worked example
Convert 1.00000e+6 nTorr to mTorr.
- 01Start with 1.00000e+6 nTorr.
- 02Multiply by the conversion factor: 1.00000e+6 × 1e-6 = 1 mTorr.
Result1.00000e+6 nTorr = 1 mTorr
Conversion table
| nTorr | mTorr |
|---|---|
| 1 | 1e-6 |
| 2 | 2e-6 |
| 5 | 5e-6 |
| 10 | 1e-5 |
| 20 | 2e-5 |
| 50 | 5e-5 |
| 100 | 1e-4 |
| 200 | 0.0002 |
| 500 | 0.0005 |
| 1000 | 0.001 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from nTorr to mTorr?
1 nTorr equals 1e-6 mTorr. To convert, multiply the value in nanotorr (vacuum) by 1e-6.
How do I convert 1 nTorr to mTorr?
1 nTorr = 1e-6 mTorr. For any value, multiply by 1e-6.
How do I convert mTorr back to nTorr?
Divide by the same factor — or equivalently, multiply by 1000000. So 1 mTorr = 1.00000e+6 nTorr.
When would I need to convert nanotorr (vacuum) to millitorr?
Vacuum-pressure conversions between nTorr and mTorr 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).