Vacuum
µm HgtomPa
Convert microns of mercury (µm Hg) to millipascals (vacuum) (mPa).
Factor1 µm Hg = 133.3224 mPa
Converter
µm Hg
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mPa
Rendered to 6 significant figures.
Formula
Formula
mPa = µm Hg × 133.3224
Multiply any value in microns of mercury by 133.3224 to obtain the value in millipascals (vacuum).
Worked example
Convert 1 µm Hg to mPa.
- 01Start with 1 µm Hg.
- 02Multiply by the conversion factor: 1 × 133.3224 = 133.322 mPa.
Result1 µm Hg = 133.322 mPa
Conversion table
| µm Hg | mPa |
|---|---|
| 1 | 133.32 |
| 2 | 266.64 |
| 5 | 666.61 |
| 10 | 1333.2 |
| 20 | 2666.4 |
| 50 | 6666.1 |
| 100 | 13332 |
| 200 | 26664 |
| 500 | 66661 |
| 1000 | 1.3332e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from µm Hg to mPa?
1 µm Hg equals 133.3224 mPa. To convert, multiply the value in microns of mercury by 133.3224.
How do I convert 1 µm Hg to mPa?
1 µm Hg = 133.322 mPa. For any value, multiply by 133.3224.
How do I convert mPa back to µm Hg?
Divide by the same factor — or equivalently, multiply by 0.007500617. So 1 mPa = 0.00750062 µm Hg.
When would I need to convert micron of mercury to millipascal (vacuum)?
Vacuum-pressure conversions between µm Hg and mPa 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).