Vacuum
Patobar
Convert pascals (vacuum) (Pa) to bar (vacuum) (bar).
Factor1 Pa = 1e-5 bar
Converter
Pa
Accepts numbers or expressions, e.g. 150 + 14.7
Result
bar
Rendered to 6 significant figures.
Formula
Formula
bar = Pa × 1e-5
Multiply any value in pascals (vacuum) by 1e-5 to obtain the value in bar (vacuum).
Worked example
Convert 100000 Pa to bar.
- 01Start with 100000 Pa.
- 02Multiply by the conversion factor: 100000 × 1e-5 = 1 bar.
Result100000 Pa = 1 bar
Conversion table
| Pa | bar |
|---|---|
| 1 | 1e-5 |
| 2 | 2e-5 |
| 5 | 5e-5 |
| 10 | 0.0001 |
| 20 | 0.0002 |
| 50 | 0.0005 |
| 100 | 0.001 |
| 200 | 0.002 |
| 500 | 0.005 |
| 1000 | 0.01 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Pa to bar?
1 Pa equals 1e-5 bar. To convert, multiply the value in pascals (vacuum) by 1e-5.
How do I convert 1 Pa to bar?
1 Pa = 1e-5 bar. For any value, multiply by 1e-5.
How do I convert bar back to Pa?
Divide by the same factor — or equivalently, multiply by 100000. So 1 bar = 100000 Pa.
When would I need to convert pascal (vacuum) to bar (vacuum)?
Vacuum-pressure conversions between Pa and bar 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).