Vacuum
mbartomTorr
Convert millibars (vacuum) (mbar) to millitorr (mTorr).
Factor1 mbar = 750.0617 mTorr
Converter
mbar
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mTorr
Rendered to 6 significant figures.
Formula
Formula
mTorr = mbar × 750.0617
Multiply any value in millibars (vacuum) by 750.0617 to obtain the value in millitorr.
Worked example
Convert 1 mbar to mTorr.
- 01Start with 1 mbar.
- 02Multiply by the conversion factor: 1 × 750.0617 = 750.062 mTorr.
Result1 mbar = 750.062 mTorr
Conversion table
| mbar | mTorr |
|---|---|
| 1 | 750.06 |
| 2 | 1500.1 |
| 5 | 3750.3 |
| 10 | 7500.6 |
| 20 | 15001 |
| 50 | 37503 |
| 100 | 75006 |
| 200 | 1.5001e+5 |
| 500 | 3.7503e+5 |
| 1000 | 7.5006e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mbar to mTorr?
1 mbar equals 750.0617 mTorr. To convert, multiply the value in millibars (vacuum) by 750.0617.
How do I convert 1 mbar to mTorr?
1 mbar = 750.062 mTorr. For any value, multiply by 750.0617.
How do I convert mTorr back to mbar?
Divide by the same factor — or equivalently, multiply by 0.001333224. So 1 mTorr = 0.00133322 mbar.
When would I need to convert millibar (vacuum) to millitorr?
Vacuum-pressure conversions between mbar 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).