Vacuum
nTorrtoµbar
Convert nanotorr (vacuum) (nTorr) to microbar (vacuum) (µbar).
Factor1 nTorr = 1.333224e-6 µbar
Converter
nTorr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
µbar
Rendered to 6 significant figures.
Formula
Formula
µbar = nTorr × 1.333224e-6
Multiply any value in nanotorr (vacuum) by 1.333224e-6 to obtain the value in microbar (vacuum).
Worked example
Convert 1.00000e+6 nTorr to µbar.
- 01Start with 1.00000e+6 nTorr.
- 02Multiply by the conversion factor: 1.00000e+6 × 1.333224e-6 = 1.33322 µbar.
Result1.00000e+6 nTorr = 1.33322 µbar
Conversion table
| nTorr | µbar |
|---|---|
| 1 | 1.3332e-6 |
| 2 | 2.6664e-6 |
| 5 | 6.6661e-6 |
| 10 | 1.3332e-5 |
| 20 | 2.6664e-5 |
| 50 | 6.6661e-5 |
| 100 | 0.00013332 |
| 200 | 0.00026664 |
| 500 | 0.00066661 |
| 1000 | 0.0013332 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from nTorr to µbar?
1 nTorr equals 1.333224e-6 µbar. To convert, multiply the value in nanotorr (vacuum) by 1.333224e-6.
How do I convert 1 nTorr to µbar?
1 nTorr = 1.33322e-6 µbar. For any value, multiply by 1.333224e-6.
How do I convert µbar back to nTorr?
Divide by the same factor — or equivalently, multiply by 750061.7. So 1 µbar = 750062 nTorr.
When would I need to convert nanotorr (vacuum) to microbar (vacuum)?
Vacuum-pressure conversions between nTorr and µbar 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).