Vacuum
kPatoinHg
Convert kilopascals (vacuum) (kPa) to inches of mercury (vacuum) (inHg).
Factor1 kPa = 0.2952998 inHg
Converter
kPa
Accepts numbers or expressions, e.g. 150 + 14.7
Result
inHg
Rendered to 6 significant figures.
Formula
Formula
inHg = kPa × 0.2952998
Multiply any value in kilopascals (vacuum) by 0.2952998 to obtain the value in inches of mercury (vacuum).
Worked example
Convert 100 kPa to inHg.
- 01Start with 100 kPa.
- 02Multiply by the conversion factor: 100 × 0.2952998 = 29.53 inHg.
Result100 kPa = 29.53 inHg
Conversion table
| kPa | inHg |
|---|---|
| 1 | 0.2953 |
| 2 | 0.5906 |
| 5 | 1.4765 |
| 10 | 2.953 |
| 20 | 5.906 |
| 50 | 14.765 |
| 100 | 29.53 |
| 200 | 59.06 |
| 500 | 147.65 |
| 1000 | 295.3 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kPa to inHg?
1 kPa equals 0.2952998 inHg. To convert, multiply the value in kilopascals (vacuum) by 0.2952998.
How do I convert 1 kPa to inHg?
1 kPa = 0.2953 inHg. For any value, multiply by 0.2952998.
How do I convert inHg back to kPa?
Divide by the same factor — or equivalently, multiply by 3.386389. So 1 inHg = 3.38639 kPa.
When would I need to convert kilopascal (vacuum) to inch of mercury (vacuum)?
Vacuum-pressure conversions between kPa and inHg 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).