Vacuum
inHgtoPa
Convert inches of mercury (vacuum) (inHg) to pascals (vacuum) (Pa).
Factor1 inHg = 3386.389 Pa
Converter
inHg
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Pa
Rendered to 6 significant figures.
Formula
Formula
Pa = inHg × 3386.389
Multiply any value in inches of mercury (vacuum) by 3386.389 to obtain the value in pascals (vacuum).
Worked example
Convert 30 inHg to Pa.
- 01Start with 30 inHg.
- 02Multiply by the conversion factor: 30 × 3386.389 = 101592 Pa.
Result30 inHg = 101592 Pa
Conversion table
| inHg | Pa |
|---|---|
| 1 | 3386.4 |
| 2 | 6772.8 |
| 5 | 16932 |
| 10 | 33864 |
| 20 | 67728 |
| 50 | 1.6932e+5 |
| 100 | 3.3864e+5 |
| 200 | 6.7728e+5 |
| 500 | 1.6932e+6 |
| 1000 | 3.3864e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from inHg to Pa?
1 inHg equals 3386.389 Pa. To convert, multiply the value in inches of mercury (vacuum) by 3386.389.
How do I convert 1 inHg to Pa?
1 inHg = 3386.39 Pa. For any value, multiply by 3386.389.
How do I convert Pa back to inHg?
Divide by the same factor — or equivalently, multiply by 0.0002952998. So 1 Pa = 0.0002953 inHg.
When would I need to convert inch of mercury (vacuum) to pascal (vacuum)?
Vacuum-pressure conversions between inHg and Pa 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).